Augmented weight lifting system

Abstract

The present disclosure provides systems for weightlifting and resistance training that incorporate interchangeable couplers for improved functionality and adaptability. Examples include a first exercise device configured for resistance training and comprising one or more first couplers disposed on one or more exterior surfaces of the first exercise device, and a second exercise device comprising a second coupler configured to be releasably coupled to a first coupler of the one or more first couplers. In some examples, the one or more first couplers being quick connect type couplers.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of and priority to U.S. Provisional Patent Application No. 63 / 763,026, filed on Feb. 25, 2025; U.S. Provisional Patent Application No. 63 / 811,284, filed on May 23, 2025; and U.S. Provisional Patent Application No. 63 / 823,685, filed on Jun. 13, 2025, the contents of which are incorporated herein by reference in their entirety.TECHNICAL FIELD

[0002] The present disclosure generally relates to exercise equipment. In specific examples, the present disclosure relates to systems for weightlifting and resistance training that incorporate interchangeable couplers for improved functionality and adaptability.BACKGROUND

[0003] Weightlifting equipment such as dumbbells, barbells, kettlebells, and cable attachments are widely used for strength training and fitness. These devices are commonly utilized in both commercial gyms and home workout environments, supporting a variety of exercise routines aimed at improving muscular strength, endurance, and overall physical health. Typically, each device is designed for specific movements and grip positions, such as pressing, curling, or swinging, and is constructed with fixed shafts, handles, or weight plates. Users often rely on these traditional implements to perform resistance exercises, circuit training, and functional fitness routines.BRIEF DESCRIPTION OF THE DRAWINGS

[0004] The present disclosure, in accordance with one or more various examples, is described in detail with reference to the following figures. The figures are provided for purposes of illustration only and merely depict typical, non-limiting aspects of such examples.

[0005] FIGS. 1A-1L illustrates examples of various configurations of a multi-functional exercise system, in accordance with examples of the present disclosure.

[0006] FIGS. 2A-2B illustrate an example of a first exercise device that can be utilized in the multi-functional exercise system of FIGS. 1A-1L, in accordance with an example of the present disclosure.

[0007] FIGS. 2C-2F illustrate an example of quick connect coupling device that can be utilized in the multi-functional exercise system, in accordance with an example of the present disclosure.

[0008] FIGS. 3A-3K illustrate various examples of a second exercise devices that can be utilized in multi-functional exercise system of FIGS. 1A-1L, in accordance with examples of the present disclosure.

[0009] FIGS. 4A-4B illustrate an example exercise device implemented as a medicine ball, in accordance with an example of the present disclosure.

[0010] FIGS. 5A-5B illustrate an example exercise device implemented as a barbell, in accordance with an example of the present disclosure.

[0011] FIG. 6 illustrates an example exercise device implemented as a curl bar, in accordance with an example of the present disclosure.

[0012] FIG. 7 illustrates an example exercise device implemented as an end cap, in accordance with an example of the present disclosure.

[0013] FIG. 8 illustrates an example exercise device implemented as an extender, in accordance with an example of the present disclosure.

[0014] FIG. 9 illustrates an example exercise device implemented as a weight plate, in accordance with an example of the present disclosure.

[0015] FIG. 10 illustrates an example exercise device implemented as a weight belt, in accordance with an example of the present disclosure.

[0016] FIG. 11 illustrates an example exercise device implemented as another weight belt, in accordance with an example of the present disclosure.

[0017] FIG. 12 illustrates an example exercise device implemented as a weight clamp, in accordance with an example of the present disclosure.

[0018] FIG. 13 illustrates an example exercise device implemented as a cable attachment, in accordance with an example of the present disclosure.

[0019] FIG. 14 illustrates an example exercise device implemented as a cable carabineer attachment, in accordance with an example of the present disclosure.

[0020] FIG. 15 illustrates an example exercise device implemented as a carabineer cable attachment, in accordance with an example of the present disclosure.

[0021] FIG. 16 illustrates an example exercise device implemented as a carabineer chain coupler, in accordance with an example of the present disclosure.

[0022] FIG. 17 illustrates an example exercise device implemented as a kettle bell, in accordance with an example of the present disclosure.

[0023] FIG. 18 illustrates an example exercise device implemented as a loose coupler 1800, in accordance with an example of the present disclosure.

[0024] FIG. 19 illustrates an example exercise device implemented as another loose coupler, in accordance with an example of the present disclosure.

[0025] FIG. 20 illustrates an example exercise device implemented as a punching bag, in accordance with an example of the present disclosure.

[0026] FIG. 21 illustrates an example exercise device implemented as another punching bag, in accordance with an example of the present disclosure.

[0027] FIG. 22 illustrates an example exercise device implemented as a rope coupler, in accordance with an example of the present disclosure.

[0028] FIG. 23 illustrates an example exercise device implemented as a weight sled, in accordance with an example of the present disclosure.

[0029] FIG. 24 illustrates an example exercise device implemented as a weight box, in accordance with an example of the present disclosure.

[0030] FIG. 25 illustrates an example exercise device implemented as a workout station, in accordance with an example of the present disclosure.

[0031] FIG. 26 illustrates an example exercise device implemented as a band holder, in accordance with an example of the present disclosure.

[0032] FIG. 27 illustrates an example exercise device implemented as another band holder, in accordance with an example of the present disclosure.

[0033] FIGS. 28A and 28B illustrate an example exercise device implemented as claw, in accordance with an example of the present disclosure.

[0034] FIG. 29 illustrates an example exercise device implemented as dumbbell holder 2900, in accordance with an example of the present disclosure.

[0035] FIG. 30 illustrates an example exercise device implemented as another dumbbell holder, in accordance with an example of the present disclosure.

[0036] FIGS. 31A and 31B illustrates an example of dumbbell, in accordance with an example of the present disclosure.

[0037] FIG. 32 illustrates an example of dumbbell, in accordance with an example of the present disclosure.

[0038] FIG. 33 illustrates an example of another dumbbell, in accordance with an example of the present disclosure.

[0039] FIG. 34 illustrate an example exercise device implemented as a barbell, in accordance with an example of the present disclosure.

[0040] FIG. 35 illustrate an example exercise device implemented as another barbell, in accordance with an example of the present disclosure.

[0041] FIGS. 36A-36F illustrate various examples of second exercise devices that can be releasably coupled to the exercises devices of FIGS. 32-36.

[0042] FIGS. 37A-37B and 38A-38B illustrate examples exercise devices implemented as band couplers, in accordance with examples of the present disclosure.

[0043] FIGS. 39A-39B and 40A-40B illustrate examples exercise devices implemented as T-junction attachments, in accordance with examples of the present disclosure.

[0044] FIG. 41 illustrates an example exercise device implemented as weight plate lifter, in accordance with an example of the present disclosure.

[0045] FIGS. 42 and 43 illustrate example dumbbells, in accordance with examples of the present disclosure.

[0046] FIGS. 44A-49 illustrate example exercise devices implemented as clevis couplers, in accordance with examples of the present disclosure.

[0047] FIG. 50 illustrates an example exercise device implemented as a weight plate, in accordance with an example of the present disclosure.

[0048] FIGS. 51A and 51B illustrate an example exercise device implemented as a workout station, in accordance with an example of the present disclosure.

[0049] FIGS. 52 and 53 illustrate example exercise devices implemented as hook couplers, in accordance with examples of the present disclosure.

[0050] FIG. 54 is a picture of an example exercise devices implemented as a hook coupler, in accordance with examples of the present disclosure.

[0051] FIG. 55 illustrates example of configuration of the multi-functional exercise, in which a clevis coupler releasably coupled to a hooked coupler in accordance an example of the present disclosure.

[0052] FIGS. 56 and 57 illustrate examples of adjustable dumbbells, in accordance with an example of the present disclosure.

[0053] The figures are not exhaustive and do not limit the present disclosure to the precise form disclosed.DETAILED DESCRIPTION

[0054] Dumbbell devices for weightlifting exercises typically include a shaft that can be gripped by a user. Weights may be attached, either rigidly secured or fixed, onto each end of the shaft for resistance. A user generally lifts the weighted shaft for exercise training.

[0055] One drawback of conventional dumbbell systems is the limited exercises that may be performed using a single dumbbell. Due to conventional systems typically including a single shaft located between the weighs, a user typically performs lifting exercises by gripping the shaft and keeping it at a substantially level orientation. This limitation can be disadvantageous, for example, where a user would like to perform other types of exercises that may benefit from different shaft orientation and / or grip location variation. In this case, the user may be forced to obtain different devices that safely accommodate different grip locations.

[0056] In some situations, a user may attempt to use a conventional dumbbell in alternative orientations, for example, by gripping portions of the dumbbell other than the shaft (e.g., by gripping the weights directly). However, conventional dumbbells may not be designed for gripping the end weight and such misuse can damage the device and / or cause injury to the user.

[0057] Accordingly, the examples disclosed herein provide for a multi-functional exercise system that enables flexible, multi-functional user engagement with exercise devices. In examples, the multi-functional exercise system includes a first exercise device, such as a dumbbell or other weighted device that can be gripped by a user for resistance training, which comprises one or more couplers configured to releasably couple the first exercise device to a coupler of a second exercise device. By coupling the first exercise device to the second exercise device, the first exercise device can be orientated in a number of different orientations, based on the second exercise device, to provide for multi-functional user engagement.

[0058] FIGS. 1A-1L illustrates examples of various configurations of a multi-functional exercise system, in accordance with examples of the present disclosure. FIGS. 1A-1L depicts configurations 100A-100L of the multi-functional exercise system used by a user U for resistance exercises. In the examples of FIGS. 1A-1L, the multi-functional exercise system includes a first exercise device 110 orientated in various orientations for multi-functional user engagement with the first device 100. The first exercise device 110 includes one or more couplers 112 configured to releasably couple the first exercise device 110 to a coupler 122 of a second exercise device 120.

[0059] In an illustrative example, the first exercise device 110 may be provided as a dumbbell 200. FIGS. 2A-2B illustrate an example of dumbbell 200, in accordance with an example of the present disclosure. The dumbbell 200 includes a shaft 202 and weights 204, 206 coupled to each end of the shaft 202. In examples, the weights 204, 206 may be rigidly secured to the ends of shaft 202, affixed thereto, or otherwise removably coupled to the ends of shaft 202. In other examples, the weights 204, 206 may be integrated with the shaft 202 (e.g., formed of an integral body).

[0060] The weights 204, 206 may include first couplers 208, 210 disposed on a respective weight 204, 206. For example, weight 204 may comprise a first coupler 208 and weight 206 may comprise a first coupler 210. In an example, the first couplers 208, 210 may be provided on an outer surface 212, 214 (also referred to as exterior surface) of a respective weight 204, 206. In some examples, the first couplers 208, 210 may be coaxial with the shaft 202, as shown in FIGS. 2A-2B. In another example, the first couplers may be disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation). For example, first couplers 208, 210 may be provided on a side surface of weights 204, 206, such as side surface 216 and 218 in an example.

[0061] Each weight 204, 206 may comprise one or more first couplers. For example, weight 204 may comprise first coupler 208, as well as one or more additional first couplers on the outer surface 212 and / or other surfaces (e.g., side surface 216). Likewise, weight 206 may comprise first coupler 210, as well as one or more additional first couplers on the outer surface 214 and / or other surfaces.

[0062] In the example of FIGS. 2A-2B, the first couplers 208, 210 may be located in respective recesses 220, 222. Recesses 220, 222 may be formed in the respective weights 204, 206, such that the respective recesses 220, 222 extends from the outer surface 212, 214 into the weight toward the shaft 202. By providing respective recesses 220, 222, in some examples, the first couplers 208, 210 may be flush or substantially flush with their respective weights 204, 206. Providing a flush or substantially flush relation, snagging or otherwise catching of the first couplers 208, 210 on surrounding structures or articles during use can be avoided, thereby not impairing typical use of the dumbbell 200 (e.g., as shown in FIG. 1A).

[0063] In examples, one or more of first couplers 208, 210 may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, one or more of first couplers 208, 210 may be provided as male plugs configured to be received (e.g., inserted into) and couple to a female receptacle. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, one or more of first couplers 208, 210 may be configured for push-on (or snap-on) coupling. In various examples, one or more of first couplers 208, 210 may be provided may be provided as any type of air hose fitting (also known as an air-line fitting), as known in the art. In an illustrative example, one or more of first couplers 208, 210 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting.

[0064] As alluded to above, examples herein can provide for a quick connect coupling interface, which may include a male plug and female receptable receptacle configured to be connected and disconnected without tools while maintaining a load-bearing connection suitable for loads during resistance training, e.g., weight lifting. The male plug and the female receptacle may be configured as an air hose-style quick-connect coupler. FIG. 2C illustrates an example quick connect type coupling interface comprising a male plug 230 that may be implemented as one more of first couplers 208, 210 and FIGS. 2D-2F illustrates an example female receptacle 240 that may be as a second coupler configured to receive and couple to the male plug. FIGS. 2C-2F is an example of a quick connect type coupler interface, in accordance with examples herein. The quick connect type coupler can be similar to air hose fitting having functionality similar to quick connect fittings (also referred to as push fittings).

[0065] The male plug 230 can include an elongated plug body 232 defining a longitudinal axis 231 and having a proximal end 233 and a distal end 234. The distal end 234 can include a lead-in nose 235 having a tapered or rounded profile configured to guide insertion into the female receptacle. The plug body 232 can further include at least one circumferential retention feature 236 located axially between the lead-in nose 235 and the proximal end 233. The circumferential retention feature 236 can be implemented as an annular groove, a shoulder, a retention ring, or another profile configured to interface with one or more locking members of the female receptacle 240 to resist axial withdrawal when the couplers are in a locked state. In some examples, the male plug 230 may further include a sealing land formed in a cylindrical surface 237 between the retention feature 236 and the proximal end 233, such as a recessed surface extending radially from cylindrical surface 237 toward the longitudinal axis 231 and configured to retain and compress an elastomeric seal along an internal surface of the female receptacle 240. The proximal end 233 of the male plug 230 can include a mounting portion 238 configured to be secured to an exercise implement, including, for example, a threaded shank, a press-fit stem, a welded boss, a riveted post, a pinned stem, or an integrally formed body portion. In the example of FIG. 2C, the mounting portion 238 is provided as a threaded shank (also referred to as a male threaded fitting) that can interface with a female threaded fitting formed, e.g., in one of recesses 220, 222 so to removably fix the male plug 230 in a respective recess.

[0066] In the example of FIG. 2C, the male plug 230 is shown as hollow along the longitudinal axis 231 providing a channel, for example, for fluid flow along the length of the elongated plug body 232. However, in some examples, the male plug 230 may be a solid body, for example, to provide rigidity and strength to minimized deformation or breakage during use with exercise devices as described herein.

[0067] The female receptacle 240 can include a receptacle body 242 having a first end 252 and a second end 250. FIG. 2D depicts a side view of the female receptacle 240, FIG. 2E depicts female receptacle 240 when viewed from the first end 252, and FIG. 2F depicts female receptacle 240 view from the second end 250. The receptacle body 242 defining a longitudinal bore 241 configured to receive the male plug 230 along a coupling axis 243. The longitudinal bore 241 can include an opening at the first end 252 into which the male plug 230 can be inserted, a cavity configured to receive the male plug, and an internal stop surface 244 configured to limit insertion depth of the male plug through contact with the retention feature 236. The female receptacle 240 can include one or more locking members (one of which is shown as locking member 245) positioned to engage the circumferential retention feature 236 of the male plug 230 when the male plug 230 is inserted into the cavity. For example, the circumferential retention feature 236 may pass the locking members during insertion, which may operate to restrain the circumferential retention feature 236 while in the locked state. The locking members can be implemented as radially movable locking balls, rollers, pawls, or segments disposed within respective radial apertures or seats of the receptacle body 242. The locking members can be retained by an axially movable sleeve 246 that is disposed around the outer surface of receptacle body 242. The sleeve 246 can be biased by a spring 247 toward a locked position in which the sleeve 246 constrains the locking members radially inward so that the locking members engage the retention feature of the male plug and resist withdrawal.

[0068] To couple the male plug 230 and female receptacle 240, the male plug 230 is inserted into the opening of the female receptacle 240. During insertion, the sleeve 246 can be operated to compress the spring 247 which releases the locking members and lead-in nose 235 of the male plug 230 can cam the locking members radially outward against the sleeve 246. When the retention feature 236 aligns or otherwise passes the locking members, the locking members may be released so to move radially inward toward the axis 243 to restrain the retention feature 236 in a locked position. At this point, the sleeve 246 returns to the locked position under spring bias. In the locked position, the elastomeric seal (if present) can form a seal against the sealing land of the male plug 230, and the retention feature 236 and locking members can cooperate to resist axial separation during exercise use.

[0069] To decouple the male plug 230 and female receptacle 240, a user can actuate the sleeve 246 by translating the sleeve 246 axially relative to the receptacle body 242 from the locked position toward an unlocked position. In the unlocked position, the sleeve 246 permits the locking members to move radially outward, thereby disengaging from the retention feature 236 of the male plug 230 and allowing the male plug 230 to be withdrawn. The sleeve 246 can return to the locked position after release due to the spring bias. As shown in FIG. 2D, the sleeve 246 may include one or more knurled or otherwise textured surfaces 249 (e.g., rubber attachments disposed thereon) to provide tactile feel and enhance grip when operated by the user.

[0070] In the example of FIGS. 2D and 2E, female receptacle 240 can include a mounting portion 248 on an end opposite the opening configured to be secured to an exercise implement. The mounting portion 248 can include, for example, a threaded shank, a press-fit stem, a welded boss, a riveted post, a pinned stem, or an integrally formed body portion. In the example of FIGS. 2D and 2E, the mounting portion 248 is provided as a threaded bore (also referred to as a female threaded fitting) that can interface with a male threaded fitting. For example, as described below in connection with FIG. 33. In another example, the mounting portion may be provided as a threaded shank or male threaded fitting that can interface with a female threaded fitting formed, so to removably fix the female receptacle to an exercise device. For example, FIG. 56 illustrates a female receptacle having a male threaded fitting as mounting portion 248.

[0071] In various examples, a male plug 230 may be disposed in a cavity of a cylindrical housing that can be formed into, affixed, or otherwise attached to an exercise device. The cavity may be provided as the recess in which the male plug 230 is disposed. As described above, the male plug 230 may be flush or substantially flush with an upper edge of the cylindrical housing.

[0072] Quick-connect coupling interfaces, such as those of FIGS. 2C-2E may be advantageous to enable use of the exercise in a plurality of orientations. In such examples, the coupling interface can be configured to directly mate and positively lock to provide a load-bearing connection that reliably transfers exercise loads between coupled implements during dynamic movements, including movements that impose varying tensile forces, compressive forces, shear forces, and bending moments. The positive locking behavior of a quick-connect coupling interface can reduce the likelihood of inadvertent separation as compared to couplers that rely primarily on frictional engagement, flexible straps, or user-dependent tightening, while also providing repeatable engagement characteristics over repeated coupling cycles.

[0073] Moreover, the quick-connect coupling interface can provide intuitive connection and disconnection that can be performed rapidly and without extra tools. For example, the coupling can be achieved by inserting a male plug into a female receptacle to engage a retention feature in a locked state, and can be decoupled by actuation of a movable sleeve that releases the engagement to permit withdrawal of the male plug. This rapid coupling behavior can allow a user to switch among multiple attachments and grip configurations in rapid succession, enabling reconfiguration of the system between exercises while maintaining a secure, load-bearing connection during use.

[0074] Furthermore, the use of quick-connect coupling interface across multiple different exercise devices further enables a modular ecosystem in which a single exercise device can be selectively coupled to different attachments, such as rigid handles, straight bars, curl bars, rope attachments, cable-machine attachments, or other implements, to support the dumbbell in a plurality of orientations. In such examples, the coupling interface can provide a direct, load-bearing mechanical connection between the implements, thereby enabling controlled transfer of exercise loads and stable support of the dumbbell by the attachment in the selected orientation, while still permitting the dumbbell to be used as a stand-alone dumbbell when uncoupled.

[0075] As alluded to above, the one or more first couplers 208, 210 can be configured to releasably couple the dumbbell 200 to a second coupler of a second exercise device. FIGS. 3A-3K illustrate various examples of a second exercise devices 300A-300K, each of which comprises a second coupler 302A-302K (collectively referred to herein as second couplers 302 or singularly as second coupler 302) configured to be releasable coupled to either of the first couplers of the first exercise device (e.g., either of the first couplers 208, 210 of dumbbell 200).

[0076] In examples, the second couplers 302 may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, second couplers 302 may be provided as female receptacles configured to receive and couple with a male plug. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, second couplers 302 may be configured for push-on (or snap-on) coupling. Thus, second couplers 302 may be provided as quick connect, snap-fittable, and / or releasably lockable devices. In various examples, second couplers 302 may be provided may be provided as any type of air hose fitting, as known in the art. In an illustrative example, second couplers 302 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting. In an example, the second couplers 302 may be female threaded fitting configured to receive a male threaded fitting.

[0077] While the above examples provide for second couplers 302 as female couplers that receive male counterpart couplers, examples herein are not limited to this configuration. For example, second couplers 302 may be provided as male couplers, in which case the one or more first couplers 208, 210 may be provided as female couplers.

[0078] As noted above, the second exercise device may be implemented as various exercises devices known in the art, except that at least one second coupler 302 is provided. FIGS. 3A-3K depict certain non-limiting examples of the types of exercises devices 300A-300K that may be implemented as the second exercise device 120 shown in FIGS. 1B-1L. By providing flexibility to couple various types of exercises devices to the dumbbell 200, the multi-functional exercise system can provide for flexible, multi-functional engagement by the user U, in which the dumbbell 200 can be used in various orientations without risk of damage to the devices or injury to user U.

[0079] For example, FIG. 3A illustrates a second exercise device 120 implemented as a straight bar attachment 300A. Straight bar attachment 300A comprises a second coupler 302A disposed perpendicular or substantially perpendicular to a shaft 304A. The shaft 304A comprises grips attachments 306A (e.g., knurled portions of shaft 304A and / or rubber attachments disposed thereon) provided, for example, on each end of shaft 304A. As shown in FIG. 3A, the second coupler 302A is affixed between the grip attachments 306A, for example, at a central portion of the shaft 304A. In some examples, the shaft 304A may be configured to slidably rotate about its axis relative to the second coupler 302A. For example, the second coupler 302A may be attached to the shaft 304A using rotating swivel center mechanism 308A (e.g., a collar that encircles the shaft 304A) that provides a pivot point about the axis of the shaft 304A.

[0080] Referring to FIG. 1K, an illustrative example of configuration 100K of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a straight bar attachment 300A releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip attachments 306A of straight bar attachment 300A, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second couplers 302A. The user U may be able to perform bicep curls, deadlifts, or any resistance exercise desired.

[0081] FIG. 3B illustrates an example a second exercise device 120 implemented as an abdominal wheel attachment 300B. Abdominal wheel attachment 300B comprises a second coupler 302B situated coaxially with a shaft 304B. The shaft 304B comprises a grip attachment 306B (e.g., knurled portions of shaft 304A and / or rubber attachments disposed thereon). As shown in FIG. 3B, the second coupler 302B is provided at an end of the shaft 304B. In some examples, the second coupler 302B may be configured to rotate relative to the shaft 304B, for example, via ball bearings or other mechanism that enables rotational movement.

[0082] Referring to FIG. 1G, an illustrative example of configuration 100G of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a pair of abdominal wheel attachments 300B releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, abdominal wheel attachments 300B can be releasably coupled to weights 204, 206 via coupling of second couplers 302B to first couplers 208, 210. The user U can grip the grip attachments 306B to perform abdominal exercise.

[0083] FIG. 3C illustrates an example a second exercise device 120 implemented as a handle attachment 300C. Handle attachment 300C comprises a handle body 304C having a grip attachment 306C on one end and a second coupler 302C disposed at another end opposite the grip attachment 306B (e.g., knurled portions of shaft 304A and / or rubber attachments disposed thereon). The handle body 304C may have a tubular or cylindrical body in a rounded square or rounded rectangular configuration, as shown in FIG. 3C. In some examples, the second coupler 302C can be affixed to handle body 304C. In another example, the second coupler 302C may be configured to slidably rotate about an axis of the end of handle body 304C relative to end of the handle body 304C. For example, the second coupler 302C may be attached to the end of handle body 304C using rotating swivel center mechanism 308C (e.g., a collar that encircles the end of handle body 304C) that provides a pivot point about the axis of the end of the handle body 304C.

[0084] Referring to FIG. 1G, an illustrative example of configuration 100C of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as one or more handle attachments 300C releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In these examples, one or more handle attachments 300C can be releasably coupled to one or more of weights 204, 206 via coupling of second couplers 302C to first couplers 208, 210. The user U can grip the grip attachments 306C to perform various exercises, such as but not limited to, deadlifts, bicep curls, and overhead press, as shown in FIG. 1C.

[0085] FIG. 3D illustrates an example a second exercise device 120 implemented as a weight collar attachment 300D. Weight collar 300D comprises a collar body 304D affixed to a second coupler 302D. In some examples, a clamping mechanism 306D can be provided configured to reduce the diameter of an opening 308D of the collar body 304D through user operation. For example, a user may rotate clamping mechanism 306D to cause the diameter of opening 308D to be reduced in size, so to cause a clamping down on another element within the opening 308D to provide a releasable friction fit therebetween. In another example, the clamping mechanism 306D may be configured for a pinch-fit, whereby clamping mechanism 306D can be rotated via a threaded fitting so to extend into opening 308D and pinch an element between the clamping mechanism 306D and an opposing surface within the opening 308D.

[0086] Referring to FIG. 1L, an illustrative example of configuration 100L of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as one or more weight collar attachments 300D releasably coupled to the first exercise devices 110 implemented as dumbbells 200. In this example, one or more weight collar attachments 300D can be releasably coupled to either of weights 204, 206 via coupling of second couplers 302D to first couplers 208, 210. The user U can insert a barbell, curl bar, or other weight-bearing bar into the openings 308D and operate clamping mechanism 306D to releasably attach the weight collar attachments 300D to the weight-bearing bar for performing various exercises, such as but not limited to, bench press, skull crushers, and the like.

[0087] FIG. 3E illustrates a second exercise device 120 implemented as a rope attachment 300E. Rope attachment 300E comprises a second coupler 302E disposed perpendicular or substantially perpendicular to an axis of rope 304E. The rope 304E comprises end caps 306E provided, for example, on each end of rope 304E. The second coupler 302A can be slidably attached to the rope 304E via a collar 308E attached to the second coupler 302E. The collar 308E may be configured to encircle a radial direction of the rope 304E and permit the second coupler 302A to slidably rotate about the axis of the rope 304E relative to the rope 304E, as well as to slide longitudinally relative to the rope 304E (e.g. permit movement of second coupler 302A from one end to the other end of rope 304E).

[0088] Referring to FIG. 1F, an illustrative example of configuration 100F of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a rope attachment 300E releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip portions of rope 304E and / or ends caps 306E and permit the dumbbell 200 to hang in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302E. The user U may be able to perform various exercises, such as bicep curls, as shown in FIG. 1F.

[0089] FIG. 3F illustrates a second exercise device 120 implemented as a curl bar attachment 300F. Curl bar attachment 300F comprises a bent shaft 304F (e.g., not straight along a central axis) having a portions bent at obtuse angles relative to each other. A second coupler 302F is disposed at a central portion of the bent shaft 304F extending perpendicular or substantially perpendicular to the central portion. The bent shaft 304F comprises grips attachments 306F (e.g., knurled portions of bent shaft 304F and / or rubber attachments disposed thereon) provided, for example, at one or more portions of the bent shaft 304A. As shown in FIG. 3F, the second coupler 302F is affixed between two grip attachments 306F. End caps 310F may be provided as well. In some examples, the second coupler 302F may be fixedly attached to the bent shaft 304F. In another example, second coupler 302F may be configured to slidably rotate about the central portion of the bent shaft 304F. For example, the second coupler 302F may be attached to the bent shaft 304F using rotating swivel center mechanism 308F (e.g., a collar that encircles the central portion of bent shaft 304F) that provides a pivot point about the axis of the bent shaft 304F.

[0090] Referring to FIG. 1D, an illustrative example of configuration 100D of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a curl bar attachment 300F releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip attachments 306F of curl bar attachment 300F, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302F. The user U may be able to perform bicep curls, deadlifts, or any resistance exercise desired.

[0091] FIG. 3G illustrates an example a second exercise device 120 implemented as a kettle bell attachment 300G. Kettle bell attachment 300G comprises a handle body 304G having a grip attachment 306G on one end and a second coupler 302G disposed at another end opposite the grip attachment 306G (e.g., knurled portions of handle body 304G and / or rubber attachments disposed thereon). The handle body 304G may have a tubular or cylindrical body in a triangular configuration, as shown in FIG. 3G. In some examples, the second coupler 302G can be affixed to handle body 304G. In another example, the second coupler 302G may be configured to slidably rotate about an axis of the end of handle body 304G relative to end of the handle body 304G. For example, the second coupler 302G may be attached to the end of handle body 304G using rotating swivel center mechanism 308G (e.g., a collar that encircles the end of handle body 304G) that provides a pivot point about the axis of the end of the handle body 304G.

[0092] Referring to FIG. 1G, an illustrative example of configuration 100G of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a kettle bell attachment 300G releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In these examples, kettle bell attachment 300G can be releasably coupled to one or more of weights 204, 206 via coupling of second coupler 302G to either of first couplers 208, 210. The user U can grip the grip attachments 306G to perform various exercises in a kettle bell configuration, as shown in FIG. 1G.

[0093] FIG. 3H illustrates a second exercise device 120 implemented as a lat bar attachment 300H. Lat bar attachment 300H comprises a bent shaft 304H having a portions that are bent at obtuse angles relative to a longitudinal central portion. A second coupler 302G is disposed on the central portion of the bent shaft 304H extending perpendicular or substantially perpendicular to the central portion. In some examples, the bent shaft 304H can comprise grips attachments (e.g., knurled portions and / or rubber attachments disposed thereon) provided, for example, on the bent portion. In some examples, the second coupler 302G may be fixedly attached to the bent shaft 304H. In another example, second coupler 302G may be configured to slidably rotate about the central portion of the bent shaft 304H. For example, the second coupler 302G may be attached to the bent shaft 304H using rotating swivel center mechanism 308G (e.g., a collar that encircles the central portion of bent shaft 304H) that provides a pivot point about the axis of the bent shaft 304H.

[0094] Referring to FIG. 1J, an illustrative example of configuration 100J of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a lat bar attachment 300G releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the bent portions of bent shaft 304H 304H, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302G. The user U may be able to perform various resistance exercises, as shown in FIG. 1J.

[0095] FIG. 3I illustrates a second exercise device 120 implemented as a horizontal v-bar attachment 300I. Horizontal v-bar attachment 300I comprises a pair of v-plates 304I parallel or substantially parallel to each other and attached via a pair of grip rods 306I and a base rod 310I. A second coupler 302I is disposed on a central portion of the base rod 310I extending perpendicular or substantially perpendicular to an axis of the base rod 310I. In some examples, the grip rods 306I can comprise knurled portions and / or rubber attachments disposed thereon for gripping. In some examples, the second coupler 302I may be fixedly attached to the base rod 310I. In another example, second coupler 302I may be configured to slidably rotate about the central portion of the base rod 310I. For example, the second coupler 302I may be attached to the base rod 310I using rotating swivel center mechanism 308I (e.g., a collar that encircles the central portion of base rod 310I) that provides a pivot point about the axis of the base rod 310I.

[0096] Referring to FIG. 1H, an illustrative example of configuration 100H of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a horizontal v-bar attachment 300I releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip rods 306I in a horizontal orientation, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302I. The user U may be able to perform various resistance exercises, as shown in FIG. 1H.

[0097] FIG. 3J illustrates a second exercise device 120 implemented as a vertical v-bar attachment 300I. Vertical v-bar attachment 300I comprises a v-shaped shaft 304J having grip attachments 306J at ends of the v-shaped shaft 304J and a second coupler 302J disposed a bend of the v-shaped shaft 304J between the grip attachments 306J (e.g., knurled portions of v-shaped shaft 304J and / or rubber attachments disposed thereon). In some examples, the second coupler 302J may be fixedly attached to the v-shaped shaft 304J. In another example, second coupler 302I may be configured to slidably rotate about the v-shaped shaft 304J. For example, the second coupler 302J may be attached to the v-shaped shaft 304J using rotating swivel center mechanism 308J (e.g., a collar that encircles the v-shaped shaft 304J) that provides a pivot point about the v-shaped shaft 304J. The vertical v-shaped attachment 300J may also include end caps 310J.

[0098] Referring to FIG. 1I, an illustrative example of configuration 100I of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a vertical v-bar attachment 300I releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip rods 306J in a vertical orientation, while the dumbbell 200 also hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302J. The user U may be able to perform various resistance exercises, as shown in FIG. 1I.

[0099] FIG. 3K illustrates an example a second exercise device 120 implemented as a dual end connector attachment 300K. Dual end connector attachment 300K comprises a pair of second couplers 302K situated coaxially at ends of a shaft 304K. In some examples, the second couplers 302K may be configured to rotate relative to the shaft 304K, for example, via ball bearings or other mechanism that enables rotational movement.

[0100] Referring to FIG. 1B, an illustrative example of configuration 100B of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a dual end connector attachments 300K releasably coupled to a pair of first exercise devices 110 each implemented as a dumbbell 200. In this example, dual end connector attachment 300K can be releasably coupled to one of weights 204, 206 via coupling of second couplers 302K to respective first couplers 208, 210. Thus, a pair of dumbbells 200 can be releasably coupled as shown in FIG. 1B, which the user U can use to perform various exercises as desired.

[0101] FIGS. 4A-4B illustrate an example exercise device implemented as a medicine ball 400, in accordance with an example of the present disclosure. FIG. 4A depicts a perspective view from the bottom left side and FIG. 4B depicts a perspective view from the top right side of the medicine ball 400. In examples, the medicine ball 400 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the medicine ball 400 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the medicine ball 400 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In some examples, the medicine ball may include a metallic core and elastomeric features on an exterior (e.g., outer surface) thereof.

[0102] The medicine ball 400 comprises a spherical body 402 having an outer surface, an axis 408, and an equator 410 about the axis 408 (e.g., surrounding the axis 408 in a radial direction). The medicine ball 400 includes one or more couplers 404A-404F (collectively referred to herein as couplers 404 or singularly as coupler 404) provided in the outer surface thereof. In examples, the one or more couplers 404 may be substantially similar to first couplers 208, 210 described above. In examples, where the medicine ball 400 is implemented as a second exercise device 120, the one or more couplers 404 may be substantially similar to second couplers 302 as described above.

[0103] In examples, medicine ball 400 may comprise a plurality of couplers 404 distributed amongst the outer surface of the body 402. For example, the plurality of couplers 404 may be symmetrically arrayed about the spherical body 402 of the medicine ball 400. In the example of FIG. 4, six couplers 404 are provided, a first subset of which are symmetrically arrayed about the axis 408 (e.g., at 90 degrees relative to each other) and a second subset of which are provided at the opposite axial ends along the axis 408 (also referred to as spherical caps). Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 404 may be located in respective recesses 406.

[0104] FIGS. 5A-4E illustrate an example exercise device implemented as a barbell 500, in accordance with an example of the present disclosure. In examples, the barbell 500 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the barbell 500 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the barbell 500 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0105] The barbell 500 comprises a shaft 502 and grips 504A and 504B. In examples, the shaft 502 may be straight or substantially straight. Collars 506A and 506B may be located adjacent to each grip 504A and 504B. Weighted sleeves 508A and 508B are located axially outward of the respective collars 506A and 506B at each end of the shaft 502. Couplers 510A and 510B are located in weighted sleeves 508A and 508B, respectively. In examples, the couplers 510 may be substantially similar to first couplers 208, 210 described above. In examples, where the barbell 500 is implemented as a second exercise device 120, the one or more couplers 510 may be substantially similar to second couplers 302 as described above. Similar to the couplers described above in connection with FIGS. 2A-2F, the couplers 510a, 510B may be located in respective recesses 512A, 512B.

[0106] FIG. 6 illustrates an example exercise device implemented as a curl bar 600, in accordance with an example of the present disclosure. In examples, the curl bar 600 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the curl bar 600 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the curl bar 600 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0107] The curl bar 600 comprises a bent shaft 602 and grips 604A-604D. In examples, the bent shaft 602 may not be straight, such that the bent shaft 602 comprises a plurality of portions that are bent at obtuse angles relative to each other. Each of grips 604A-604D are disposed on respective bent portions as shown in FIGS. 6A-6C. Collars 606A and 606B may be located adjacent to grips 604A and 604B and collars 606A and 606B may be coaxially aligned with each other (e.g., aligned along a common axis). Weighted sleeves 608A and 608B are located axially outward of the respective collars 606A and 606B at each end of the bent shaft 602. Couplers 610A and 610B are located in weighted sleeves 608A and 608B, respectively. In examples, the couplers 610 may be substantially similar to first couplers 208, 210 described above. In examples, where the curl bar 600 is implemented as a second exercise device 120, the one or more couplers 610 may be substantially similar to second couplers 302 as described above. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 610a, 610B may be located in respective recesses 612A, 612B.

[0108] FIG. 7 illustrates an example exercise device implemented as an end cap 700, in accordance with an example of the present disclosure. In examples, the end cap 700 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the end cap 700 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the end cap 700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In an particular example, the end cap 700 may be a barbell end cap that can be releasably coupled to an end of barbell 500 (as shown in FIG. 7) and / or curl bar 600 (e.g., at an end of a respective weighted sleeve).

[0109] In the example of FIG. 7, the end cap 700 comprises cap shaft 702 and a top plate 704 at a first end of the cap shaft. The cap shaft 702 may include a second end comprising a coupler 706. In examples, the coupler 706 may be substantially similar to first couplers 208, 210 or the second couplers 302, depending on the implementation. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 706 may be located in a recess 708.

[0110] FIG. 8 illustrates an example exercise device implemented as an extender 800, in accordance with an example of the present disclosure. In examples, the extender 800 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the extender 800 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the extender 800 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the extender 800 may be a barbell extender that can be releasably coupled to an end of barbell 500 and / or curl bar 600 (e.g., at an end of a respective weighted sleeve).

[0111] In the example of FIG. 8, the extender 800 comprises an extender shaft 802 having couplers 804 and 806 coaxially aligned on respective ends of the extender shaft 802. In the example of FIG. 8, the coupler 804 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. In this case, similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 804 may be located in a recess 808. Thus, coupler 804 may be releasably coupled to an end of barbell 500, curl bar 600, or other weight-bearing bar and enable releasably coupling to yet another exercise device, such as dumbbell 200 or any of second exercise devices 300A-300K.

[0112] FIG. 9 illustrates an example exercise device implemented as a weight plate 900, in accordance with an example of the present disclosure. In examples, the weight plate 900 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the weight plate 900 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the weight plate 900 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the weight plate 900 may be releasably coupled to an end of barbell 500, curl bar 600 (e.g., at an end of a respective weighted sleeve), and / or an extender 800.

[0113] In the example of FIG. 9, the weight plate 900 comprises a flat or substantially flat plate 902 having major face 912, a central axis 904, an outer rim 906 defining an equator surrounding the plate 902 about the central axis 904. The outer rim 906 comprises an outer surface 908, which maybe generally cylindrical. The outer rim 906 may have a greater axial dimension than that of the plate 902 (e.g., the diameter of plate 902 is equal to or less than an inner surface of the outer rim 906). In examples, the weight plate 904 may be made of dense rubber and / or metal according to a desired amount of weight attributed to the weight plate. Weight plates, such as weight plate 900, are typically available in 2.5 lbs., 5 lbs., 10 lbs., 25 lbs., 35 lbs., and 45 lbs.

[0114] The weight plate 900 also comprises one or more couplers 910A-910C (collectively referred to herein as couplers 910 or singularly as coupler 910). In examples, the one or more couplers 910 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. In some examples, at least one coupler 910 may be may be provided in the major face 912 aligned with the axis 904. Additionally, in some examples, a plurality of couplers 910 may be symmetrically spaced apart the equator on the outer rim. In the particular example of FIG. 9, the weight plate 900 comprises four couplers symmetrically spaced apart from the equator, for example, couplers 910B and 910C are shown and two others, opposite couplers 910B and 910C respectively, can be provided on the outer surface 908 (e.g., one axially aligned with coupler 910B and another axially aligned with coupler 910C). The weight plate 900 can also include two couplers coaxially aligned with the plate 902, such as coupler 910A and another coupler on the back surface of major face 912 axially aligned with axis 904. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 910 may be located in respective recesses 914A-914F.

[0115] FIG. 10 illustrates an example exercise device implemented as a weight belt 1000, in accordance with an example of the present disclosure. In examples, the weight belt 1000 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the weight belt 1000 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the weight belt 1000 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0116] In the example of FIG. 10, the weight belt 1000 comprises a band 1002 and a chain 1004 that, collectively, form a continuous loop. The chain 1004 may be provided as interlocking chains, as shown in FIG. 10. The weight belt 1000 also comprises a coupler 1006 mounted to the chain 1004, for example, one of the interlocking chains. In examples, the coupler 1006 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1006 may be located in respective recesses 1008.

[0117] FIG. 11 illustrates an example exercise device implemented as another weight belt 1100, in accordance with an example of the present disclosure. Weight belt 1100 may be substantially similar to weight belt 1000. For example, the weight belt 1100 comprises a band 1102 and a chain 1104 that, collectively, form a continuous loop. The weight belt 1000 also comprises a coupler 1106 mounted to the chain 1104. The difference between weight belt 1000 and weight belt 1100 is that the chain 1104 is longer than the chain 1004.

[0118] FIG. 12 illustrates an example exercise device implemented as a weight clamp 1200, in accordance with an example of the present disclosure. In examples, the weight clamp 1200 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the weight clamp 1200 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the weight clamp 1200 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the weight clamp 1200 may be releasably coupled to an end of barbell 500, curl bar 600 (e.g., at an end of a respective weighted sleeve), and / or an extender 800.

[0119] In the example of FIG. 12, the weight clamp 1200 comprises a hinged clamp 1202 configured to be releasably secured to a shaft 1204 (e.g., weight sleeve and / or shaft of barbell 500, curl bar 600, extender 800, and / or dumbbell 200). The hinged clamp 1200 may include a pivot point 1206 having an axis of rotation that is substantially parallel with the shaft 1204. The hinged clamp 1202 may include a bottom seat 1208 and a top clamp 1210 that can be rotated about pivot point 1206 relative to the bottom seat 1208 to secure the shaft 1204 therebetween. The hinged clamp 1202 may also include a latch mechanism comprising a catch 1212 and a latch arm 1214 configured to interlock and secure the top clamp 1210 to the bottom seat 1208.

[0120] The weight clamp 1200 also comprises a coupler 1216 mounted to the hinged clamp 1202. For example, as shown in FIGS. 12A-12F, the coupler 1216 can be mounted to the bottom seat 1208 and extends in a direction perpendicular or substantially perpendicular to the pivot point 1206 opposite the top clamp 1210. However, in another example, the coupler 1216 may be attached to the top clamp 1210. In examples, where the weight clamp 1200 is implemented as a first exercise device 110, the coupler 1216 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1216 may be located in a recess 1218.

[0121] FIG. 13 illustrates an example exercise device implemented as a cable attachment 1300, in accordance with an example of the present disclosure. In examples, the cable attachment 1300 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the cable attachment 1300 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the cable attachment 1300 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the cable attachment 1300 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the cable attachment 1300 to a cable of the cable machine and releasably coupling another exercise device to the cable attachment 1300.

[0122] In the example of FIG. 13, the cable attachment 1300 comprises a plate 1302 and one or more couplers 1304A-1304C (collectively referred to herein as couplers 1304 or singularly as coupler 1304) extending from plate 1302. In some examples, a first subset of couplers 1304 can be disposed on a first side 1306 of plate 1302 and extending perpendicularly or substantially perpendicularly from the first side 1306 away from plate 1302. Additionally, in some examples, a second subset of couplers 1304 can be disposed on a second side 1308 of plate 1302. In the particular example of FIG. 13, two couplers 1304 are provided on the first side 1306 and one coupler 1304 is provided on the second side 1308. In examples, the one or more couplers 1304 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1304 may be located in respective recesses 1310A-1310C. That is, for example, the couplers 1304 may include a cylindrical housing extending from first side 1306 (or second side 1308). The cylindrical housing may include a recess in the form of a cavity in which a male plug (or similar coupling element) is disposed. As described above, the male plug may be flush or substantially flush with an upper edge of the cylindrical housing.

[0123] FIG. 14 illustrates an example exercise device implemented as a cable carabineer attachment 1400, in accordance with an example of the present disclosure. In examples, the cable carabineer attachment 1400 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the cable carabineer attachment 1400 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the cable carabineer attachment 1400 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the cable carabineer attachment 1400 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the cable carabineer attachment 1400 to a cable of the cable machine and releasably coupling another exercise device to the cable carabineer attachment 1400.

[0124] In the example of FIG. 14, the cable carabineer attachment 1400 comprises a plate 1402 and one or more couplers 1404A-1404B (collectively referred to herein as couplers 1404 or singularly as coupler 1404) extending from plate 1402. In some examples, the couplers 1404 can be disposed on a first side 1406 of plate 1402 and extending perpendicularly or substantially perpendicularly from the first side 1406 away from plate 1402. Additionally, in some examples, one or more carabineers 1412 can be disposed (e.g., affixed thereto) on a second side 1408 of plate 1402. In the particular example of FIG. 14, two couplers 1404 are provided on the first side 1406 and one carabineer 1412 is provided on the second side 1408. In examples, the one or more couplers 1404 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1404 may be located in respective recesses 1410A-1410B.

[0125] FIG. 15 illustrates an example exercise device implemented as a carabineer cable attachment 1500, in accordance with an example of the present disclosure. In examples, the carabineer cable attachment 1500 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the carabineer cable attachment 1500 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the carabineer cable attachment 1500 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the carabineer cable attachment 1500 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the carabineer cable attachment 1500 to a cable of the cable machine and releasably coupling another exercise device to the carabineer cable attachment 1500.

[0126] In the example of FIG. 15, the carabineer cable attachment 1500 comprises a plate 1502 and one or more couplers 1504 extending from plate 1502. In some examples, the couplers 1504 can be disposed on a second side 1508 of plate 1502 and extending perpendicularly or substantially perpendicularly from the second side 1508 away from plate 1502. Additionally, in some examples, one or more carabineers 1512A-1512B (collectively referred to herein as carabineers 1512 or singularly as carabineer 1512) can be disposed (e.g., affixed thereto) on a first side 1506 of plate 1502. In the particular example of FIG. 15, one coupler 1504 is provided on the second side 1508 and two carabineers 1512A and 1512B are provided on the first side 1506. In examples, the one or more couplers 1504 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1504 may be located in a recess 1510.

[0127] FIG. 16 illustrates an example exercise device implemented as a carabineer chain coupler 1600, in accordance with an example of the present disclosure. In examples, the carabineer chain coupler 1600 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the carabineer chain coupler 1600 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the carabineer chain coupler 1600 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the carabineer chain coupler 1600 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the carabineer chain coupler 1600 to a cable of the cable machine and releasably coupling another exercise device to the carabineer chain coupler 1600.

[0128] In the example of FIG. 16, the carabineer chain coupler 1600 comprises a chain 1602 having a carabineer 1606 disposed on a first end and a coupler 1604 disposed on a second end of the chain 1602. In examples, the chain 1602 may be interlocking chains, in which the carabineer 1606 and coupler 1604 can be affixed to respective interlocking chains (e.g., integrated therewith or securedly connected thereto). In examples, the one or more couplers 1604 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1604 may be located in a recess 1608.

[0129] FIG. 17 illustrates an example exercise device implemented as a kettle bell 1700, in accordance with an example of the present disclosure. In examples, the kettle bell 1700 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the kettle bell 1700 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the kettle bell 1700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0130] In the example of FIG. 17, the kettle bell 1700 comprises a weighted bell 1702 having a base 1704 and a handle 1706 configured to be griped by a user. The kettle bell 1700 also includes a first horn 1708 and a second horn 1710 affixed (e.g., securedly attached to or integrated with the weight bell 1702) extending from the weight bell 1702 opposite the base 1704 to a respective corner 1712, 1714 attached to each end of the handle 1706. The first and second horns 1708, 1710 couple the weighted bell 1702 to the handle 1706. The kettle bell 1700 may be made of a metallic core having a metallic outer surface, rubber outer surface, other suitable materials as known in the art, or combinations thereof. In examples, the handle 1706 may include a grip 1720, such as a knurled surface and / or rubber attachments disposed thereon.

[0131] The kettle bell 1700 also comprises one or more couplers 1716 disposed on the outer surface thereof. For example, the one or more couplers 1716 may be distributed about the kettle bell 1700. In an illustrative example, the couplers 1716 may be disposed on the surface the weighted bell 1702, the base 1704, the handle 1706, the corner 1712, the corner 1714, or combinations thereof. In some examples, the couplers 1716 may be symmetrically arrayed about the surface of the weighted bell 1702 (e.g., about an equator along a plane that is substantially parallel to an axis 1718 of the handle 1706). In the example of FIG. 17, eight couplers 1716 are provided, where a respective coupler 1716 is provided in the corner 1712, the corner 1714, base 1704, and handle 1706 and four couplers 1716 are symmetrically arrayed about the surface of the weight bell 1702. In examples, the one or more couplers 1716 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 1716 may be located in respective recesses 1722.

[0132] FIG. 18 illustrates an example exercise device implemented as a loose coupler 1800, in accordance with an example of the present disclosure. In examples, the loose coupler 1800 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the loose coupler 1800 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0133] In the example of FIG. 18, the loose coupler 1800 comprises a band 1802 configured to be used by a user for exercise. The band 1802 comprises one or more couplers 1804 disposed on one or more ends of the band 1802. The band 1802 may be one of a resistance band, strength band, and rope. In the example of FIG. 18, band 1802 comprises two couplers 1804 provided at each end of the band 1802. The one or more couplers 1804 may be implemented as second couplers 302 as described above.

[0134] FIG. 19 illustrates an example exercise device implemented as another loose coupler 1900, in accordance with an example of the present disclosure. In examples, the loose coupler 1900 may be implemented as the first exercise device 110 of FIGS. 1A-1L. For example, the loose coupler 1900 may be used as the first exercise device 110 and releasably coupled to a second exercise device 120.

[0135] In the example of FIG. 19, the loose coupler 1900 comprises a band 1902 configured to be used by a user for exercise. The band 1902 comprises one or more couplers 1904 disposed on one or more ends of the band 1902. The band 1902 may be one of a resistance band, strength band, and rope. In the example of FIG. 19, band 1902 comprises two couplers 1904 provided at each end of the band 1902. The one or more couplers 1904 may be implemented as first couplers 208, 210 described above. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 1904 may be located in respective recesses 1906. In some examples, the couplers 1904 may be implemented as either of first couplers 208, 210 and second couplers 302, or combinations thereof.

[0136] FIG. 20 illustrates an example exercise device implemented as a punching bag 2000, in accordance with an example of the present disclosure. In examples, the punching bag 2000 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0137] In the example of FIG. 21, the punching bag 2000 comprises a body 2002 having an outer surface 2004 defining a bag. The outer surface may comprise leather, synthetic materials, canvas or other materials that resist abrasion from punching. The body 2002 may be configured to be hung from a first end 2006 via one or more couplers 2010. In the example of FIG. 20, the first end 2006 may be connected to an end of a chain 2008, which can comprise a coupler 2010 on another end of the chain 2008 opposite the body 2002. The chain 2008 may comprise interlocking chains. The coupler 2010 may be implemented as either of first couplers 208, 210, and second coupler 302. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 2010 may be located in a recess 2012.

[0138] FIG. 21 illustrates an example exercise device implemented as another punching bag 2100, in accordance with an example of the present disclosure. In examples, the punching bag 2100 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0139] In the example of FIG. 21, the punching bag 2100 comprises a body 2102 having an outer surface 2104 defining a bag. The outer surface may comprise leather, synthetic materials, canvas or other materials that resist abrasion from punching. The body 2102 may be configured to be hung from a first end 2106 via one or more couplers 2110. In the example of FIG. 21, a coupler 2110 may be provided at the first end 2106 (e.g., securedly attached or otherwise integrated therewith the first end 2106). The punching bag 2100 may also include a chain 2108 comprising couplers 2110 disposed at the ends of the chain 2108. The chain 2108 may comprise interlocking chains.

[0140] The couplers 2110 may be implemented as first couplers 208, 210, second coupler 302 or combinations thereof. For example, in the case of FIG. 21, coupler 2110 at the first end 2106 may be a first coupler 208 configured to releasably connect to a coupler 2110 at an end 2114 of chain 2108 as a second coupler 302. The coupler at end 2116 of chain 2108 may be either one of first couplers 208, 210 or second coupler 302. Alternatively, coupler 2110 at the first end 2106 may be a second coupler 302 configured to releasably connect to a coupler 2110 at an end 2114 of chain 2108 as a first coupler 208. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2110 may be located in respective recesses 2112.

[0141] FIG. 22 illustrates an example exercise device implemented as a rope coupler 2200, in accordance with an example of the present disclosure. In examples, the rope coupler 2200 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0142] In the example of FIG. 22, the rope coupler 2200 comprises a U-shaped shaft 2202 and one or more couplers 2204 attached to the U-shaped body 2202. The U-shaped body 2202 can include a first end 2206, a second end 2208, and a curved midsection 2210 between the first and second ends 2206, 2208. In examples, the U-shaped body 2202 may comprise a tubular shaft of material (e.g., metal or other suitable material) bent to form a U-shape as shown in FIG. 22.

[0143] The rope coupler 2200 may include one or more couplers 2204 provided at one or more of the midsection 2210, the first end 2206, and the second end 2208. In the example of FIG. 22, couplers 2204 are provided at the first end 2206, the second end 2208, and the midsection 2210. In some examples, a coupler 2204 (e.g., the coupler 2210 at midsection 2210) may be attached to the body 2202 using rotating swivel center mechanism 2214 (e.g., a collar that encircles the shaft of body 2202) that provides a pivot point about the axis of the shaft. The couplers 2204 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2204 may be located in respective recesses 2212.

[0144] FIG. 23 illustrates an example exercise device implemented as a weight sled 2300, in accordance with an example of the present disclosure. In examples, the weight sled 2300 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0145] In the example of FIG. 23, the weight sled 2300 is configured to be used by a user for exercise, for example, for sled pushes. The weight sled 2300 comprises a base 2302, one or more handles 2304, and a weight holder 2306. The base 2302 may include skis 2308 on a bottom side configured to slide along a floor or surface due to pushing forces from a user. The one or more handles 2304 may be provided as upright posts connected to the base 2302 on a top side and extend substantially perpendicular to the base 2302 away from the bottom side. The handles 2304 may be configured for gripping by a user for exerting a pushing force. In some examples, as shown in FIG. 23, the weight sled 2300 may include an anchor bar 2312 connected to the base 2302 via upright posts 2314.

[0146] The weight sled 2300 also comprises one or more couplers 2310. For example, the one or more handles 2304 may comprise one or more couplers 2310 attached thereto. In the example of FIG. 23, the weight sled 2300 comprises three couplers 2310, one attached to each upright post defining handles 2304 and another attached to anchor bar 2312. The couplers 2310 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2310 may be located in respective recesses 2316.

[0147] FIG. 24 illustrates an example exercise device implemented as a weight box 2400, in accordance with an example of the present disclosure. In examples, the weight box 2400 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0148] In the example of FIG. 24, the weight box 2400 is configured to be used by a user for exercise. The weight box 2400 comprises a cuboid body 2402 comprising a plurality of surface, surfaces 2404A-2404C are shown in FIG. 24 as illustrative examples. The weight box 2400 may be similar to a pylo box comprising a wooden core structure and optional cover. The weight box 2400 also comprises one or more couplers 2406 distributed about the surfaces 2404A-2404F. For example, one or more of surfaces 2404A-2404C may include one or more couplers 2406 provided thereon. In the example of FIG. 24, six couplers 2406 are provided, where one coupler is provided on surface 2404A and two couplers 2406 are provided on surface 2404. Opposing facing surfaces may have similar configurations of couplers. The couplers 2410 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2410 may be located in respective recesses 2408.

[0149] FIG. 25 illustrates an example exercise device implemented as a workout station 2500, in accordance with an example of the present disclosure. In examples, the workout station 2500 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. The workout station 2500 may be, for example, a power rack or other weight training station.

[0150] In the example of FIG. 25, the workout station 2500 is configured to be used by a user for exercise, for example. The workout station 2500 comprises a frame consisting of a plurality of upright posts 2502A-D (also referred to as structure support posts) connected to a plurality of base cross-bars 2504A-B configured to support the workout station 2500 on a floor or surface, and a plurality of top cross-bars 2506A-F. The workout station 2500 may include a plurality of attachments configured to enable various exercises. In the example of FIG. 25, the plurality of attachments includes seats 2508 for sitting upon and weight stacks 2510 which can be utilized for cable based exercises.

[0151] The workout station 2500 also comprises one or more couplers 2512. For example, one or more couplers 2512 may be attached to one or more of the upright posts 2502A-D, one or more of the top cross-bars 2506A-F, or combinations thereof. In the example of FIG. 25, the workout station 2500 comprises ten couplers 2512. For example, cross-bars 2506A and 2506B each comprise two couplers 2512 attached to a central region of the respective cross-bar that extend in direction parallel to a plane formed by the cross-bars 2506A and 2506B. Cross-bars 2506C and 2506D also include two couplers 2512 at each end of a respective cross bar. The couplers 2512 on cross-bars 2506C and 2506D extend substantially perpendicular to the length of the respective cross-bar toward the base cross-bars 2504A-B. Likewise, cross-bars 2506E and 2506F each comprise one coupler 2512 at a respective attached to each upright post defining handles 2504 and another attached to anchor bar 2506. The couplers 2512 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2512 may be located in respective recesses.

[0152] While a specific configuration is shown in FIG. 25, the scope of the present disclosure is not intended to be limited to this configuration, which is provided as an illustrative example. For example, any configuration of a workout station may be utilized, such that the workout station comprises one or more couplers 2512 for providing points of attachment for one or more other exercise devices.

[0153] FIG. 26 illustrates an example exercise device implemented as a band holder 2600, in accordance with an example of the present disclosure. In examples, the band holder 2600 may be configured to be used by a user for exercise, for example, to hold a band (e.g., a resistance band, strength band, rope, or the like).

[0154] In the example of FIG. 26, the band holder 2600 comprises a ball joint 2602 and a looped holder 2604. The looped holder 2604 may be formed of a tubular shaft shaped into a loop, as shown in FIG. 26, having ends attached to an axial end of ball joint 2602. The ball joint 2602 may comprises one or more couplers 2606 disposed on an axial end of the ball joint 2602 opposite the looped holder 2604 along an axis 2608. In the example of FIG. 26, the coupler 2606 may be implemented as one of first couplers 208, 210 described above. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 2606 may be located in a recess 2610.

[0155] FIG. 27 illustrates an example exercise device implemented as another band holder 2700, in accordance with an example of the present disclosure. In examples, the band holder 2700 may be configured to be used by a user for exercise, for example, to hold a band (e.g., a resistance band, strength band, rope, or the like).

[0156] In the example of FIG. 27, the band holder 2700 comprises a ball joint 2702 and a looped holder 2704. The looped holder 2704 may be formed of a tubular shaft shaped into a loop, as shown in FIG. 27, having ends attached to an axial end of ball joint 2702. The ball joint 2702 may comprises one or more couplers 2706 disposed on an axial end of the ball joint 2702 opposite the looped holder 2704 along an axis 2708. In the example of FIG. 27, the coupler 2706 may be implemented as a second coupler 302 described above.

[0157] FIG. 28 illustrates an example exercise device implemented as claw 2800, in accordance with an example of the present disclosure. In examples, the claw 2800 may be configured to be used by a user for exercise, for example, to hold an exercise device. In the example of FIG. 28, claw 2800 is shown holding a weight of a dumbbell D.

[0158] In the example of FIG. 28, the claw 2800 comprises a shaft 2802 with an axis 2804. A coupler 2806 is provided on an axial end 2812 of the shaft 2802. In examples, talons 2808 extend arcuately from an opposite axial end 2810. The talons are configured to releasably grip the weight of dumbbell D via a deformation force that deforms the talons 2808 during insertion of the weight and a spring force that restores the talons 2808 to a resting state. In the resting state, ends 2814 of talons 2808 grip an inner surface of the weight so to securely hold the weight within the talons 2808. The coupler 2806 may be implemented as one of first couplers 208, 210 or second coupler 302. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2806 may be located in a recess 2816.

[0159] FIG. 29 illustrates an example exercise device implemented as dumbbell holder 2900, in accordance with an example of the present disclosure. In examples, the dumbbell holder 2900 may be configured to be used by a user for exercise, for example, to hold an exercise device. In the example of FIG. 29, dumbbell holder 2900 is shown holding a weight of a dumbbell D.

[0160] In the example of FIG. 29, the dumbbell holder 2900 comprises a structure having shaft 2902 with an axis 2904, first base plate 2906, and a second base plate 2908 orientated perpendicular or substantially perpendicular relative to the first base plate 2906. The first and second bases 2906 and 2908 may be provided on an axial end 2910 of the shaft 2902. The structure also includes bars 2912 arcuately extending from the first and second base plates 2906 and 2908, for example, from respective ends of respective base plates. The bars 2912 can be attached to a support ring 2914 configured to releasably encircle a shaft of the dumbbell D. The support ring 2914 may be coaxially aligned with the axis 2904 and have an inner radius that is less than a cross-sectional dimension of the weight of the dumbbell D.

[0161] In examples, a coupler 2916 may be provided on an axial end 2918 of the shaft 2902 opposite the support ring 2914. The coupler 2916 may be implemented as one of first couplers 208, 210 or second coupler 302. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2916 may be located in a recess 2920.

[0162] FIG. 30 illustrates an example exercise device implemented as another dumbbell holder 3000, in accordance with an example of the present disclosure. In examples, the dumbbell holder 3000 may be configured to be used by a user for exercise, for example, to hold an exercise device. In the example of FIG. 30, dumbbell holder 3000 is shown holding a weight of a dumbbell D.

[0163] In the example of FIG. 30, the dumbbell holder 3000 comprises a structure having a first base plate 3006, and a second base plate 3008 orientated perpendicular or substantially perpendicular relative to the first base plate 3006. The first and second bases 3006 and 3008 may be provided on an axial end 3010 of the axis 3002. The structure also includes bars 3012 arcuately extending from the first and second base plates 3006 and 3008, for example, from respective ends of respective base plates. The bars 3012 can be attached to a support ring 3014 configured to releasably encircle a shaft of the dumbbell D. The support ring 3014 may be coaxially aligned with the axis 3002 and have an inner radius that is less than a cross-sectional dimension of the weight of the dumbbell D.

[0164] In the example of FIG. 30, a looped handle 3004 may be provided on an axial end opposite the support ring 3014. The looped handle 3004 may connect to ends of one of base plates 3006 or 3008 (e.g., base plate 3006 shown in FIG. 30). The looped handle 3004 may be configured to be gripped by a user. In some examples, the looped handle 3004 may include a grip, such as a knurled surface and / or rubber attachments disposed thereon.

[0165] FIG. 31A illustrates an example of dumbbell 3100, in accordance with an example of the present disclosure. The dumbbell 3100 may be substantially similar to dumbbell 200, except as provided herein. Accordingly, dumbbell 3100 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0166] The weights 204, 206 may also include first couplers 208, 210 disposed on a respective weight 204, 206, as described above in connection with FIGS. 2A-2B. In the example of FIG. 31A, the first couplers 208, 210 includes internal bars located in respective recesses 220, 222. Internal bar 3102 included in weight 204 is shown in FIG. 31A as an illustrative example, and one or more similar internal bars may be located in weight 206. The internal bars may be smaller (e.g., smaller diameter) than the shaft. In the example of FIG. 31A, the internal bar 3102 is perpendicular to an axis of the shaft 202 and the internal bar on weight 206 may be similarly orientated. Additionally, internal bars may be located side surfaces of the weights and these internal bars may be parallel, perpendicular, or at other angles relative to the axis of the shaft 202.

[0167] The internal bars may be configured to releasably couple to second couplers similar to the examples described above. However, in the case of internal bars, the second coupler may be implemented as a carabineer 3104 as shown in FIG. 31B. Carabineer 3104 may also be coupled or integrated into to a second exercise device, such as the straight bar attachment 3106 and handle attachments 3108. In another example, the second coupler may be a rope or other elongated device that can be looped around the internal bar, for example, by a knot or other method.

[0168] FIG. 32 illustrates an example of dumbbell 3200, in accordance with an example of the present disclosure. The dumbbell 3200 may be substantially similar to dumbbell 200, except as provided herein. Accordingly, dumbbell 3200 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0169] The weights 204, 206 may include first couplers 3208, 3210 disposed on a respective weight 204, 206. In the example of FIG. 32, weights 204, 206 include respective recesses 3220, 3222 configured to receive and releasably connect to first couplers 3208, 3210. To this end, the weights 204, 206 may include first threaded couplers 3202, 3204 in respective recesses 3220, 3222. For example, weight 204 may comprise recess 3220 having a first threaded coupler 3202 formed in the outer surface 212 and weight 206 may comprise recess 3222 having a first threaded coupler 3204 in the outer surface 214 (as shown in FIGS. 2A and 2B). In the above examples, recess 3220, 3222 and respective first threaded couplers 3202, 3204 may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein.

[0170] The first couplers 3208, 3210 may be included as part of coupler bodies 3224, 3226. Coupler bodies 3224, 3226 may include respective shafts 3214, 3216 (e.g., cylindrical bodies) and respective second threaded couplers 3206, 3212, each of which is coaxially aligned with respective first couplers 3208, 3210. The second threaded couplers 3206, 3212 may be referred to as male threaded shafts, such as a threaded bolt that can be received by and interface with a threaded hole. The coupler bodies 3224, 3226 may comprise recesses in the form of cavities (cavity 3232 is shown as an example) extending from respective outer edges 3228, 3230 of the coupler bodies 3224, 3226 toward the second threaded couplers 3206, 3212. The couplers 3208, 3210 may be disposed within the respective cavities. As described above, the couplers 3208, 3210 may be flush or substantially flush with an upper edge of the cylindrical housing.

[0171] In examples, the second threaded couplers 3206, 3212 may be configured to threadedly interface with respective first threaded couplers 3202, 3204 to attach first couplers 3208, 3210 to a respective weight 204, 206 within a respective recess 3220, 3222. For example, recess 3220 of weight 204 may receive coupler body 3224 and first threaded coupler 3202 may interface with second threaded coupler 3206 to releasably connect the coupler 3208 to the weight 204. Likewise, recess 3222 of weight 206 may receive coupler body 3226 and first threaded coupler 3204 may interface with second threaded coupler 3212 to releasably connect the coupler 3210 to the weight 206.

[0172] In some examples, the recesses 3220, 3222, and as such the first threaded couplers 3202, 3204, may be coaxial with the shaft 202, as shown in FIG. 32. The second threaded couplers 3206, 3212 may be coaxial with a shaft 3214, 3216 of respective first couplers 3208, 3210. Thus, when the first couplers 3208, 3210 are received by the recesses 3220, 3222, the first couplers 3208, 3210 can be coaxial with the shaft 202.

[0173] In another example, recess may be disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation). For example, one or more recesses having first threaded couplers may be provided a side surface, such as side surface 216 and / or 218. As such, one or more of first couplers 3208, 3210 may be disposed on a side surface of weights 204, 206 via the recesses.

[0174] First couplers 3208, 3210 (which may be substantially similar to couplers 208, 210) may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, one or more of first couplers 208, 210 may be provided as male plugs configured to be received (e.g., inserted into) and couple to a female receptacle. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, one or more of first couplers 208, 210 may be configured for push-on (or snap-on) coupling. In various examples, one or more of first couplers 208, 210 may be provided may be provided as any type of air hose fitting (also known as an air-line fitting), as known in the art. In an illustrative example, one or more of first couplers 208, 210 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting.

[0175] The one or more first couplers 3208, 3210 can be configured to releasably couple the dumbbell 3200 to a second coupler of a second exercise device, as described above. For example, FIGS. 3A-3K illustrate various examples of a second exercise devices 300A-300K, each of which comprises a second coupler 302 configured to be releasable coupled to either of the first couplers 3208, 3210 of dumbbell 3200 in a manner similar to first couplers 208, 210 described above.

[0176] FIG. 33 illustrates an example of another dumbbell 3300, in accordance with an example of the present disclosure. The dumbbell 3300 may be substantially similar to dumbbell 3200, except as provided herein. Accordingly, dumbbell 3300 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0177] The weights 204, 206 may include first couplers 3308, 3310 disposed on a respective weight 204, 206. In the example of FIG. 33, weights 204, 206 first threaded couplers 3202, 3304 configured to releasably connect to first couplers 3308, 3310. For example, weight 204 may comprise a first threaded coupler 3302 provided on the outer surface 212 and weight 206 may comprise a first threaded coupler 3304 provided the outer surface 214. In the above examples, first threaded couplers 3302, 3304 may be referred to as male threaded shafts, such as threaded bolts having external threads configured to interface with a counterpart internal thread of a recess that the bolt is inserted therein.

[0178] The first couplers 3308, 3310 may be included as part of coupler bodies 3324, 3326, which may be substantively similar to coupler bodies 3226, 3224 described above. Coupler bodies 3324, 3326 may include respective shafts 3314, 3316 and respective recesses 3220, 3222 having second threaded couplers 3306, 3312 formed therein. The recesses 3220, 3222 and shafts 3314, 3316 may be coaxially aligned with respective first couplers 3308, 3310. The second threaded couplers 3306, 3312 may be provided as female threaded receptacles, such as threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein. The coupler bodies 3324, 3326 may comprise recesses in the form of cavities extending from respective outer edges of the coupler bodies toward the second threaded couplers, as described above. The couplers 3308, 3310 may be disposed within the respective cavities. As described above, the couplers 3308, 3310 may be flush or substantially flush with an upper edge of the cylindrical housing

[0179] In examples, the second threaded couplers 3306, 3312 may be configured to threadedly interface with respective first threaded couplers 3302, 3304 to attach first couplers 3308, 3310 to a respective weight 204, 206 within a respective recess 3320, 3322. For example, recess 3320 of weight 204 may receive coupler body 3324 and first threaded coupler 3302 may interface with second threaded coupler 3306 to releasably connect the coupler 3308 to the weight 204. Likewise, recess 3322 of weight 206 may receive coupler body 3326 and first threaded coupler 3304 may interface with second threaded coupler 3312 to releasably connect the coupler 3310 to the weight 206.

[0180] In some examples, the first threaded couplers 3202, 3304 may be coaxial with the shaft 202, as shown in FIG. 32. The second threaded couplers 3306, 3312 may be coaxial with a shaft 3314, 3316 of respective first couplers 3308, 3310. Thus, the first couplers 3308, 3310 can be coaxial with the shaft 202.

[0181] In another example, first threaded couplers may be disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation). For example, one or more first threaded couplers may be provided on a side surface, such as side surface 216 and / or 218.

[0182] First couplers 3308, 3310 (which may be substantially similar to couplers 208, 210) may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, one or more of first couplers 208, 210 may be provided as male plugs configured to be received (e.g., inserted into) and couple to a female receptacle. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, one or more of first couplers 208, 210 may be configured for push-on (or snap-on) coupling. In various examples, one or more of first couplers 208, 210 may be provided may be provided as any type of air hose fitting (also known as an air-line fitting), as known in the art. In an illustrative example, one or more of first couplers 208, 210 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting.

[0183] The one or more first couplers 3308, 3310 can be configured to releasably couple the dumbbell 3300 to a second coupler of a second exercise device, as described above. For example, FIGS. 3A-3K illustrate various examples of a second exercise devices 300A-300K, each of which comprises a second coupler 302 configured to be releasable coupled to either of the first couplers 3308, 3310 of dumbbell 3300 in a manner similar to first couplers 208, 210 described above.

[0184] FIG. 34 illustrate an example exercise device implemented as a barbell 3400, in accordance with an example of the present disclosure. The barbell 3400 may be substantially similar to barbell 500, except as provided herein. Accordingly, barbell 3400 includes a substantially straight shaft 502. In examples, barbell 3400 may also include grips (e.g., grips 504A and 504B) and collars (e.g., collars 506A and 508B) located adjacent to the grips, as shown in FIGS. 5A-5B. In some examples, barbell 3400 may also include weighted sleeves (e.g., weighted sleeves 508A and 508B) at each end of the shaft 502.

[0185] Barbell 3400 also includes first threaded couplers 3402, 3404 on axial ends of the shaft 502. The first threaded couplers 3402, 3404 may be configured to releasably connect to coupler bodies 3424, 3426. For example, the barbell 3400 may comprise first threaded coupler 3402 provided on a one axial end of the shaft 502 and first threaded coupler 3404 on an opposite axial end of the shaft 502. In the above examples, first threaded couplers 3402, 3404 may be referred to as male threaded shafts, such as threaded bolts having external threads configured to interface with a counterpart internal thread of a recess that the bolt is inserted therein. In some examples, the first threaded couplers 3402, 3404 may be located at ends of weighted sleeves (e.g., axial ends of weighted sleeves 508A and 508B).

[0186] The coupler bodies 3424, 3426 may be substantially similar to coupler bodies 3324, 3326 described above in connection with FIG. 33. As such, second threaded couplers of each coupler bodies 3424, 3426 may be configured to threadedly interface with respective first threaded couplers 3402, 3404 to attach first couplers to a respective end of shaft 502. The one or more first couplers can be configured to releasably couple the barbell 3400 to a second coupler of a second exercise device, as described above.

[0187] In some examples, the barbell 3400 may be implemented as a curl bar. In this case, the shaft may not be straight as described above in connection with FIGS. 6A-6E.

[0188] FIG. 35 illustrate an example exercise device implemented as another barbell 3500, in accordance with an example of the present disclosure. The barbell 3500 may be substantially similar to barbell 500, except as provided herein. Accordingly, barbell 3500 includes a substantially straight shaft 502. In examples, barbell 3500 may also include grips (e.g., grips 504A and 504B) and collars (e.g., collars 506A and 508B) located adjacent to the grips, as shown in FIGS. 5A-5B. In some examples, barbell 3500 may also include weighted sleeves (e.g., weighted sleeves 508A and 508B) at each end of the shaft 502.

[0189] Barbell 3500 also includes first threaded couplers 3502, 3504 formed in recesses on the axial ends of the shaft 502. The first threaded couplers 3502, 3504 may be configured to receive and releasably connect to coupler bodies 3524, 3526 (e.g., similar to recesses 3220, 3222 and first threaded couplers 3202, 3204 described above in connection with FIG. 32). For example, the barbell 3500 may comprise first threaded coupler 3502 in a recess provided on one axial end of the shaft 502 and first threaded coupler 3504 in another recess on an opposite axial end of the shaft 502. In the above examples, first threaded couplers 3502, 3504 may be referred to as a female threaded receptacle, such as a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein. In some examples, the first threaded couplers 3502, 3504 may be located at ends of weighted sleeves (e.g., axial ends of weighted sleeves 508A and 508B).

[0190] The couplers bodies 3524, 3526 may be substantially similar to couplers bodies 3224, 3226 described above in connection with FIG. 32. As such, second threaded couplers of each coupler bodies 3524, 3526 may be configured to threadedly interface with respective first threaded couplers 3502, 3504 to attach first couplers to a respective end of shaft 502. The one or more first couplers can be configured to releasably couple the barbell 3500 to a second coupler of a second exercise device, as described above.

[0191] In some examples, the barbell 3500 may be implemented as a curl bar. In this case, the shaft may not be straight as described above in connection with FIGS. 6A-6E.

[0192] FIG. 36 illustrates various examples of second exercise devices 3600A-3600F, each of which comprises a second coupler 3602 configured to be releasable coupled to one or more of the examples described in connection with FIGS. 32-36.

[0193] For example, FIG. 36 illustrates end cap 3600A having a shaft 3604A and a second coupler 3602A connected thereto. The second coupler 3602A may be formed in a recess 3606A of a coupler body 3608A extending substantially perpendicular from the shaft 3604A. In this case, the second coupler 3602A may be a female threaded receptacle that can interface with a male threaded shaft. For example, second coupler 3602A may releasably couple the end cap 3600A by interfacing with one of first threaded couplers 3302, 3304, 3402, or 3404. In an example, second coupler 3602A may be configured to slidably rotate about the central portion of the shaft 3604A. For example, the second coupler 3602A may be attached to the shaft 3604A using rotating swivel center mechanism 3610A (e.g., a collar that encircles the central portion of shaft 3604A) that provides a pivot point about the axis of the bent shaft 3604A. In some examples, the second coupler 3602A can be affixed to end cap 3600A.

[0194] FIG. 36 also illustrates end cap 3600B having a shaft 3604B and a second coupler 3602B connected thereto. The second coupler 3602B may be formed on coupler body 3608B extending substantially perpendicular from the shaft 3604B. In this case, the second coupler 3602B may be a male threaded shaft that can interface with a female threaded receptacle. For example, second coupler 3602B may releasably couple the end cap 3600B by interfacing with one of first threaded couplers 3202, 3204, 3502, or 3504. In an example, second coupler 3602B may be configured to slidably rotate about the central portion of the shaft 3604B. For example, the second coupler 3602B may be attached to the shaft 3604B using rotating swivel center mechanism 3610B (e.g., a collar that encircles the central portion of shaft 3604B) that provides a pivot point about the axis of the bent shaft 3604B. In some examples, the second coupler 3602E can be affixed to end cap 3600B.

[0195] FIG. 36 also illustrates handle attachment 3600C having a handle body 3604C including a second coupler 3602C disposed at an end. The handle body 3604C may include a grip attachment (e.g., grip attachment 306C of FIG. 3C) on an end opposite the second coupler 3602C. The handle body 3604D may have a tubular or cylindrical body in a rounded square or rounded rectangular configuration, as shown in FIG. 36. The second coupler 3602C may be formed on coupler body 3608C extending substantially perpendicular from the handle body 3604C. In this case, the second coupler 3602C may be a male threaded shaft that can interface with a female threaded receptacle. For example, second coupler 3602C may releasably couple the handle 3600C by interfacing with one of first threaded couplers 3202, 3204, 3502, or 3504. In some examples, the second coupler 3602C can be affixed to handle body 3604C. In another example, the second coupler 3602C may be configured to slidably rotate about an axis of the end of handle body 3604C relative to end of the handle body 3604C. For example, the second coupler 3602C may be attached to the end of handle body 3604C using rotating swivel center mechanism 3610C (e.g., a collar that encircles the end of handle body 3604C) that provides a pivot point about the axis of the end of the handle body 3604C.

[0196] FIG. 36 also illustrates handle attachment 3600D having a handle body 3604D including a second coupler 3602D disposed at an end. The handle body 3604D may include a grip attachment (e.g., grip attachment 306C of FIG. 3C) on an end opposite the second coupler 3602D. The handle body 3604D may have a tubular or cylindrical body in a rounded square or rounded rectangular configuration, as shown in FIG. 36. The second coupler 3602C may be formed in a recess 3606C of a coupler body 3608C extending substantially perpendicular from the shaft 3604A. In this case, the second coupler 3602C may be a female threaded receptacle that can interface with a male threaded shaft. For example, second coupler 3602C may releasably couple the handle attachment 3600D by interfacing with one of first threaded couplers 3302, 3304, 3402, or 3404. In some examples, the second coupler 3602D can be affixed to handle body 3604C. In another example, the second coupler 3602D may be configured to slidably rotate about an axis of the end of handle body 3604D relative to end of the handle body 3604C. For example, the second coupler 3602D may be attached to the end of handle body 3604D using rotating swivel center mechanism 3610D (e.g., a collar that encircles the end of handle body 3604C) that provides a pivot point about the axis of the end of the handle body 3604C.

[0197] FIG. 36 illustrates straight bar 3600E having a shaft 3604E and a second coupler 3602E connected thereto and grip attachments 3612E, 3614E (e.g., grip attachment 306C of FIG. 3C) on axial ends of the shaft 3604E. The second coupler 3602E may be formed in a recess 3606E of a coupler body 3608E extending substantially perpendicular from the shaft 3604E. In this case, the second coupler 3602E may be a female threaded receptacle that can interface with a male threaded shaft. For example, second coupler 3602E may releasably couple the straight bar 3600E by interfacing with one of first threaded couplers 3302, 3304, 3402, or 3404. In an example, second coupler 3602E may be configured to slidably rotate about the central portion of the shaft 3604E. For example, the second coupler 3602E may be attached to the shaft 3604E using rotating swivel center mechanism 3610E (e.g., a collar that encircles the central portion of shaft 3604A) that provides a pivot point about the axis of the bent shaft 3604E. In some examples, the second coupler 3602E can be affixed to straight bar 3600E.

[0198] FIG. 36 also illustrates straight bar 3600F having a shaft 3604F and a second coupler 3602F connected thereto and grip attachments 3612F, 3614F (e.g., grip attachment 306C of FIG. 3C) on axial ends of the shaft 3604F. The second coupler 3602F may be formed on coupler body 3608F extending substantially perpendicular from the shaft 3604F. In this case, the second coupler 3602F may be a male threaded shaft that can interface with a female threaded receptacle. For example, second coupler 3602F may releasably couple the straight bar 3600E by interfacing with one of first threaded couplers 3202, 3204, 3502, or 3504. In an example, second coupler 3602F may be configured to slidably rotate about the central portion of the shaft 3604F. For example, the second coupler 3602F may be attached to the shaft 3604F using rotating swivel center mechanism 3610F (e.g., a collar that encircles the central portion of shaft 3604F) that provides a pivot point about the axis of the bent shaft 3604F. In some examples, the second coupler 3602F can be affixed to straight bar 3600F.

[0199] FIGS. 37A-37B illustrate an example exercise device implemented as a band coupler 3700, in accordance with an example of the present disclosure. In examples, the band coupler 3700 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the band coupler 3700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0200] In the example of FIGS. 37A-37B, the band coupler 3700 comprises a band 3702 configured to be used by a user for exercise. The band 3702 comprises one or more rings 3706 disposed on one or more ends of band 3702. For example, the band 3702 may be a looped band (e.g., an elastic looped band, a resistance looped band, strength looped band, or the like) that can be looped around the one or more rings 3706 at one or more ends of the band 3702. In another example, the one or more rings 3706 may be removably coupled or clipped into the loop. One or more carabineers 3708 may releasably couple one or more couplers 3704 to the one or more rings 3706. In the example of FIGS. 37A-37B, band coupler 3704 comprises two couplers 3704 attached to two carabineers 3708 that releasably coupler to two rings 3706 at each end of the band 3702. In the example of FIG. 37, the one or more couplers 3704 may be implemented as second couplers 302 as described above.

[0201] Furthermore, FIG. 37B illustrates one or more band couplers 3700 releasably coupled to one or more dumbbells 200. In this case, band coupler 3700 may be considered a second exercise device 120 and dumbbell 200 may be considered a first exercise device 110. For example, two dumbbells 200 are shown, each of which includes a shaft 202 and weights 204, 206 coupled to each end of the shaft 202. The weights 204, 206 include first couplers 208, 210 (only couplers 210 is shown in FIG. 37B), as described above. The couplers 3704 of the band coupler 3600 may be configured to releasable couple to first couplers 208, 210. In the example of FIG. 37B, two band couplers 3700 are shown coupled to two dumbbells 200.

[0202] FIGS. 38A-38B illustrates an example exercise device implemented as another band coupler 3800, in accordance with an example of the present disclosure. In examples, the band coupler 3800 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the band coupler 3700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. Band coupler 3800 may be substantively similar to band coupler 3700, except that band coupler 3800 comprises one or more couplers 3804 releasably coupled to the one or more rings 3706. The one or more couplers 3804 may be implemented as first couplers 208 and / or 210, described above. In this case, the one or more band couplers 3800 may be releasably coupled to one or more dumbbells 200 having second couplers 302 included on weights 204, 206.

[0203] FIGS. 39A-39B illustrates an example exercise device implemented as a T-junction attachment 3900, in accordance with an example of the present disclosure. In examples, the T-junction attachment 3900 may be implemented as the first exercise device 110 of FIGS. 1A-1L. For example, the T-junction attachment 3900 may be used as the first exercise device 110 and releasably couple to a second exercise device 120 (e.g., triangular handle attachment 3920).

[0204] T-junction attachment 3900 comprises a T-shaped body 3908 having a first shaft 3910 and a second shaft 3912 disposed perpendicular or substantially perpendicular to first shaft 3910 at a first end of the second shaft 3912. The second shaft 3912 may comprise a first coupler 3904 on the second end of second shaft 3912 opposite the first shaft 3910. As shown in FIGS. 39A-39B, the second shaft 3912 can be affixed between the ends of the first shaft 3910, for example, at a central portion of the first shaft 3910. One or more second couplers 3902 may be disposed at one or more ends of the first shaft 3910. For example, second couplers 3902 are shown disposed at both ends of the first shaft 3910. The first couplers 3904 may be implemented as first couplers 208 and / or 210, described above, and couplers 3902 may be implemented as second couplers 302, described above.

[0205] In the illustrative example of configuration 3915 of the multi-functional exercise system is shown, in which the T-junction attachment 3900 is implemented as the first exercise device 110 releasably coupled to a triangular handle attachment 3920. The triangular handle attachment 3920 comprises a handle body 3924 having a grip region 3926 on one end and a coupler 3922 disposed at another end opposite the grip region 3926 (e.g., knurled portions of handle body 3924 and / or rubber attachments disposed thereon). The handle body 3924 may have a tubular or cylindrical body in a triangular configuration, as shown in FIGS. 39A-39B. In some examples, the coupler 3922 can be affixed to handle body 3924. In another example, the coupler 3902 may be configured to slidably rotate about an axis of the end of handle body 3924 relative to end of the handle body 3924. For example, the coupler 3922 may be attached to the end of handle body 3924 using rotating swivel center mechanism 3928 (e.g., a collar that encircles the end of handle body 3924) that provides a pivot point about the axis of the end of the handle body 3924. In this example, the coupler 3922 may be implemented as a second coupler 302, as described above, that can releasably couple to coupler 3904 of the T-junction attachment 3900 (or other first exercised device 120) as shown in FIGS. 39A-39B.

[0206] Additionally, the T-junction attachment 3900 may be used as the second exercise device 120 and releasably couple to another first exercise device 110, while simultaneously implemented as a first exercise device 110 and releasably couple to a second exercise device 120. That is, as shown in FIG. 39B, the T-junction attachment 3900 can be releasably coupled to one or more dumbbells 200 (e.g., a first exercised device 110), while also releasably coupled to the triangular handle attachment 3900. Accordingly, the T-junction attachment 3900 can enable shared attachments with multiple different exercises devices, such as those described herein.

[0207] FIGS. 40A-40B illustrates an example exercise device implemented as another T-junction attachment 4000, in accordance with an example of the present disclosure. In examples, the T-junction attachment 4000 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the T-junction attachment 4000 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. T-junction attachment 4000 may be substantively similar to T-junction attachment 3900, except that T-junction attachment 4000 comprises a coupler 4002 on an end of second shaft 3912 and one or more couplers 4004 on one or more ends of shaft 3910. In this example, the one or more couplers 4004 may be implemented as first couplers 208 and / or 210, described above, while the coupler 4002 may be implemented as the second coupler 302, described above.

[0208] In the illustrative example of configuration 3935 of the multi-functional exercise system is shown, in which the T-junction attachment 4000 is implemented as the second exercise device 120 releasably coupled to a dumbbell 200 as a first exercise device 120. For example, as shown in 40A-40B, coupler 4002 of the T-junction attachment 3900 can be releasably coupled to one of first couplers 208, 210 of the dumbbell 200.

[0209] Additionally, the T-junction attachment 4000 may be used as the first exercise device 110 and releasably couple to another second exercise device 120, while simultaneously implemented as a second exercise device 120 and releasably coupled to a first exercise device 110. That is, as shown in FIG. 40B, the T-junction attachment 4000 can be releasably coupled to one or more handle attachments 4020 (e.g., a second exercised device 120), while also releasably coupled to the dumbbell 200. The handle attachments 4020 may include a shaft 4024 having a handle region 4026 thereon and a coupler 4022 disposed at an end of the shaft. The coupler 4022, in this example, may be implemented as a second coupler 302.

[0210] The triangular handle attachment 3920 comprises a handle body 3924 having a grip region 3926 on one end and a coupler 3922 disposed at another end opposite the grip region 3926 (e.g., knurled portions of handle body 3924 and / or rubber attachments disposed thereon). The handle body 3924 may have a tubular or cylindrical body in a triangular configuration, as shown in FIG. 39. In some examples, the coupler 3922 can be affixed to handle body 3924. In another example, the coupler 3902 may be configured to slidably rotate about an axis of the end of handle body 3924 relative to end of the handle body 3924. For example, the coupler 3922 may be attached to the end of handle body 3924 using rotating swivel center mechanism 3928 (e.g., a collar that encircles the end of handle body 3924) that provides a pivot point about the axis of the end of the handle body 3924. In this example, the coupler 3922 may be implemented as a second coupler 302, as described above, that can releasably couple to coupler 3904 of the T-junction attachment 3900 (or other first exercised device 120) as shown in FIG. 39.

[0211] In some implementations, T-junction 4000 (as well as T-junction 3900) can be provided for cable machines, for example, where the cable is overhead, such as back workouts. The examples herein can enable attachment of one or more exercise devices to a single cable (e.g., an example of which is described below in connection with FIGS. 51A and 51B). This configuration can help to isolate muscles and / or enable attachments that utilize two hook-ups.

[0212] FIG. 41 illustrates an example exercise devices implemented as a weight plate lifter 4100, in accordance with an example of the present disclosure. In examples, the weight plate lifter 4100 may be implemented as a first exercise device 110 and / or a second exercise device 120 of FIGS. 1A-1L. For example, an instance of weight plate lifter 4100 may be used as a first exercise device 110 and releasably couple to a second exercise device 120 (e.g., weight plate 900), and another instance of weight plate lifter 4100 may be used as a second exercise device 120 and releasably couple to a first exercise device 110 (e.g., weight plate 900).

[0213] Weight plate lifter 4100 comprises a handle body 4108 disposed on a side of a plate body 4106. The handle body 4108 may include a grip region, such as a knurled portion of the handle body 4108 and / or rubberized surface for improved grip. The weight plate lifter 4100 also comprises a coupler 4104 disposed at a side of plate body 4106 opposite the handle body 4106. The weight plate lifter 4100 may include a shaft 4110 extending perpendicular or substantially perpendicular to the plate body 4106, for example, from a central region of plate body 4106. The coupler 4104 may be disposed at an end of the shaft 4110 opposite the plate body 4106. In the example of FIG. 41, weight plate lifter 4100 may include reinforcing structures 4112 at an intersection of the shaft 4110 and plate body 4106. The reinforcing structures 4112 may be provided as reinforcing ribs configured to reinforce the junction between the coupler 4104 and the plate body 4106, for example, by reinforcing the structural stiffness and rigidity therebetween. The coupler 4104 may be implemented, for example, as first coupler 208 and / or 210, as described above.

[0214] In an illustrative example of the multi-functional exercise system, in one or more instances of weight plates lifter 4100 can be releasably coupled to a weight plate 900, in accordance with an example. For example, weight plate 900, as described above, comprises a first coupler 910A implemented as first coupler 208 (or 210) and a second coupler 910B implemented as second coupler 302, as described above. Thus, in this example, coupler 4104 of weight plates lifter 4100A releasably couples to coupler 902B, while coupler 4102 of weight plates lifter 4100B releasably couples to coupler 902A.

[0215] FIG. 42 illustrates an example of dumbbell 4200, in accordance with an example of the present disclosure. The dumbbell 4200 may be substantially similar to dumbbell 200, except as provided herein. Accordingly, dumbbell 4200 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0216] The weights 204, 206 may also include couplers 4208, 4210 disposed on a respective weight 204, 206. In the example of FIG. 42, the couplers 4208, 4210 are provided as hook bars located in respective outer surfaces 212, 214. The hook bars my form a semi-circular structure having a hooked body, the diameter of the semi-circular structure may be larger a diameter of the shaft 202. However, the diameter of the semi-circular structure may be smaller than that of the shaft 202. In the example of FIG. 42, the hooked bars may comprise first and second end extending perpendicular, substantially perpendicular, or at an acute angle relative to an axis of the shaft 202 from a respective outer surface. The hooked body may connect one end to the other end.

[0217] The internal bars may be configured to releasably couple to other coupler as described above. For example, the other coupler may be implemented as a carabineer that can be releasably coupled to one or more of the hooked bars. In another example, the other coupler may be a band (e.g., band coupler and / or loose coupler described above), rope, or other elongated device that can be looped around one or more of the hooked bars, for example, by a knot or other method.

[0218] FIG. 43 illustrates an example of dumbbell, in accordance with an example of the present disclosure. The dumbbell may implemented as dumbbell 3200, except as provided herein. Accordingly, dumbbell 4200 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0219] The weights 204, 206 may be configured to releasably couple one or more hook attachments 4300 via couplers 4308 to a respective weight 204, 206 (two hook attachments 4300 are shown in FIG. 43). In the example of FIG. 43, weights 204, 206 include respective recesses (recess 3222 shown in FIG. 43 as an illustrative example, with an example of recess 3220 shown in FIG. 32), as described above in connection with FIG. 32, configured to receive and releasably connect to first couplers 4308, 4310. To this end, the weights 204, 206 may include first threaded couplers 3202, 3204 (threaded coupler 3202 shown in FIG. 32) in respective recesses 3220, 3222. For example, as shown in FIG. 43, weight 206 may comprise recess 3222 having a first threaded coupler 3204 formed in the outer surface. In the above examples, recess 3220, 3222 and respective first threaded couplers 3202, 3204 may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein.

[0220] The hook attachment 4300 may comprises couplers 4308 as part of coupler body 4302. Coupler body 4302 may include a shaft 4314, threaded coupler 4308 coaxially aligned with the shaft 4314, and a looped head (or eyelet) 4306, forming an eye screw like structure. The looped head 4306 may be provided as a fully or partial ring torus that is fully, substantially, or partially closed. The ring torus may have a center axis that is perpendicular or substantially perpendicular to the shaft 4314. The threaded coupler 4308 may be referred to as male threaded shafts, such as a threaded bolt that can be received by and interface with a threaded hole.

[0221] In examples, the threaded coupler 4308 may be configured to threadedly interface with one of threaded couplers 3202, 3204 to attach one or more hook attachments 4300 to a respective weight 204, 206 within a respective recess 3220, 3222. For example, as shown in FIG>43, recess 3222 of weight 206 may receive coupler body 4302 of a first hook attachment 4300 and threaded coupler 3204 may interface with threaded coupler 4308 of the first hook attachment 4300 to releasably connect the hook attachment 4300 to the weight 206. Likewise, recess 3220 of weight 204 may receive coupler body 4302 of a second hook attachment 4300 and threaded coupler 3202 may interface with threaded coupler 4308 of the second hook attachment 4300 to releasably connect the hook attachment 4300 to the weight 204. In some examples, the recesses 3220, 3222, and as such the hook attachments 4300, may be coaxial with the shaft 202, as shown in FIG. 43.

[0222] In another example, recess disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation) may releasably couple one or more hook attachments 4300. For example, one or more recesses having first threaded couplers may be provided a side surface, such as side surface 216 and / or 218. As such, one or more hook attachments 4300 may be disposed on a side surface of weights 204, 206 via the recesses.

[0223] FIGS. 44A-44B illustrates an example exercise device implemented as a clevis coupler 4400, in accordance with an example of the present disclosure. In examples, the clevis coupler 4400 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1A-1L. For example, the clevis coupler 4400 may releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0224] In the example of FIGS. 44A-44B, the clevis coupler 4400 comprises a coupler body 4406 having a first end 4408 (also referred to as a first surface) and a second end (also referred to as a second surface) opposite the first end 4408. A coupler 4404 may be disposed on the first end 4408 extending from the first end 4408 in a direction opposite the coupler body 4406. The coupler 4404 may be disposed at a central region of the first end 4408. The coupler 4404 may be implemented, for example, as first coupler 208 and / or 210 described above. Accordingly, coupler 4404 may releasably couple to a second coupler 302 (or the like) described above, so to releasably couple the clevis coupler 4400 to a second exercise device.

[0225] A clevis fastener may be disposed on the second surface extending in a direction opposite the coupler body 4406. The clevis fastener may comprise two clevis members 4410, 4412 forming a U-shaped opening. While the clevis members 4410, 4412 are provided having a specific shape (e.g., rounded triangles), examples herein are not limited to this shape and the clevis members 4410, 4412 may have other shapes (e.g., semi-circular, semi-ovular, rounded rectangular, or any shape as desired). In an example, the clevis members 4410, 4412 may be provided as tongs having respective holes for receiving the clevis pin 4418. The clevis members 4410, 4412 may be parallel or substantially parallel to each other and may extend perpendicular or substantially perpendicular to the second surface. The clevis members 4410, 4412 each include a hole (hole 4414 is shown in FIGS. 44A-44B as an example) configured to receive a clevis pin 4418. In some examples, a split pin may be inserted in the clevis pin 4418 via a through hole in an orientation that intersects with an axis of the clevis pin 4418. The split pin may hold the clevis pin 4418 in place. In either case, the clevis pin 4418, when inserted in the holes of the clevis members 4410, 4412 may function to restrain a coupler or other attachment mechanism of exercise device within a space between the clevis members 4410, 4412.

[0226] In the illustrative example of configuration 4420 of the multi-functional exercise system is shown, in which the clevis coupler 4400 is releasably coupled to a straight bar attachment 4430, in accordance with an example. For example, as shown in FIG. 44B, straight bar attachment 4430, in this example, comprises a shaft 4434 having grips attachments 4436 (e.g., knurled portions and / or rubber attachments disposed thereon) provided, for example, on each end of shaft 4434. A hook coupler 4432 may be affixed between the grip attachments 4436, for example, at a central portion of the shaft 4434. The hook coupler 4432 may be similar to the couplers 4208, 4210 of FIG. 42 (e.g., the hooked bars). The shaft 4434, in some examples, may be configured to slidably rotate about its axis relative to the coupler 4432. For example, the coupler 4432 may be attached to the shaft 4434 using rotating swivel center mechanism 4438 (e.g., a collar that encircles the shaft 4434) that provides a pivot point about the axis of the shaft 4434. Accordingly, in the example of configuration 4420, the straight bar attachment 4430 can be releasably coupled to the clevis couple 4400, for example, by receiving the coupler 4432 within the space between the clevis members 4410, 4412 and restraining the coupler 4432 therein using the clevis pin 4418.

[0227] FIG. 45A-45B illustrates an example exercise device implemented as another clevis coupler 4500, in accordance with an example of the present disclosure. Clevis coupler 4500 may be substantively similar to clevis coupler 4400, except that clevis coupler 4500 comprises a coupler 4502 on the first end 4408. In this example, the couplers 4502 may be implemented as second coupler 302, described above.

[0228] FIGS. 46A-46B illustrates an example exercise device implemented as another clevis coupler 4600, in accordance with an example of the present disclosure. Clevis coupler 4600 may be substantively similar to clevis coupler 4400, except that clevis coupler 4600 comprises eyelet body 4610 extending from the first end 4408. Eyelet body 4610 may include a shaft 4614 and a looped head (or eyelet) 4616, forming an eye screw like structure, similar to hook attachment 4300 of FIG. 43. Shaft 4614 may extend from the first end 4408 in a direction opposite the coupler body 4406, for example, from a central region of the first end 4408. The shaft 4614 may be perpendicular or substantially perpendicular to the first end 4408.

[0229] In the illustrative example of configuration 4602 of the multi-functional exercise system is shown, in which the clevis coupler 4600 is releasably coupled to straight bar attachment 4430, in accordance with examples herein. For example, the straight bar attachment 4430 can be releasably coupled to the clevis couple 4600, for example, by receiving the coupler 4432 within the space between the clevis members 4410, 4412 and restraining the coupler 4432 therein using the clevis pin 4418.

[0230] Configuration 4602 also illustrates an example in which the clevis coupler 4600 is releasably coupled to dumbbell 4200 of FIG. 2. For example, a carabineer 4620 can be releasably coupled to coupler 4210 (or coupler 4208) of dumbbell 4200. The carabineer 4620 is also releasably coupled to the clevis coupler 4600 by inserting the carabineer 4620 into the loop head 4616 of the eyelet body 4610.

[0231] FIGS. 47A-47B illustrates an example exercise device implemented as another clevis coupler 4700, in accordance with an example of the present disclosure. Clevis coupler 4700 may be substantively similar to clevis coupler 4600, except that clevis coupler 4700 can be releasably coupled to a hook attachment 4300 of FIG. 43. For example, the first surface 4408 may include a first threaded coupler 4702 in a recess 4720 formed in the first surface 4408. In this example, recess 4720 and respective first threaded coupler 4702 may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein. Accordingly, the clevis coupler 4700 may be configured to releasable couple to hook attachment 4300, for example, by threadedly interfacing threaded coupler 4308 with threaded coupler 4702 to attach the hook attachment 4300 to the clevis coupler 4700. Configuration 4722 illustrates a multi-functional exercise system, in which the clevis coupler 4700 is releasably coupled to straight bar attachment 4430 and dumbbell 4200, in accordance with examples herein.

[0232] FIG. 48 illustrates an example exercise device implemented as another clevis coupler 4800, in accordance with an example of the present disclosure. Clevis coupler 4800 may be substantively similar to clevis coupler 4700, except that clevis coupler 4800 is shown releasably coupled to a coupler body 3224 having a first coupler 3208, as described in connection with FIG. 32. For example, recess 4720 and respective first threaded coupler 4702 may be configured to releasable couple to first coupler 3208, for example, by inserting shaft 3214 into recess 4720 and threadedly interfacing threaded coupler 3206 with threaded coupler 4702 to attach the coupler body 3224 to the clevis coupler 4800. Configuration 4820 illustrates a multi-functional exercise system, in which the clevis coupler 4800 is releasably coupled to straight bar attachment 4430 and coupler body 3224, in accordance with examples herein.

[0233] FIG. 49 illustrates an example exercise device implemented as another clevis coupler 4900, in accordance with an example of the present disclosure. Clevis coupler 4900 may be substantively similar to clevis coupler 4800, except that clevis coupler 4900 is shown releasably coupled to a coupler body 4901. The coupler body 4901 may be substantively similar to coupler body 3224, except that coupler body 4901 comprises coupler 4902, for example, implemented as a second coupler 302 as described above, in place of first coupler 3206. For example, recess 4720 and respective first threaded coupler 4702 may be configured to releasable couple to coupler 4902, for example, by inserting shaft 3214 into recess 4720 and threadedly interfacing threaded coupler 3206 with threaded coupler 4702 to attach the coupler body 4901 to the clevis coupler 4800. Configuration 4920 illustrates a multi-functional exercise system, in which the clevis coupler 4900 is releasably coupled to straight bar attachment 4430 and coupler body 4901, in accordance with examples herein.

[0234] FIG. 50 illustrates an example exercise device implemented as a weight plate 5000, in accordance with an example of the present disclosure. The weight plate 5000 may be substantially similar to weight plate 900 described above, except as provided herein.

[0235] In the example of 5000, the weight plate 5000 comprises a flat or substantially flat plate 902 having a first major face 912A, a second major face 912B, a central axis 904, and an outer rim 906 defining an equator surrounding the plate 902 about the central axis 904. The outer rim 906 comprises an outer surface 908, which maybe generally cylindrical. Additional examples can be found in above in connection with FIGS. 9A-9D.

[0236] In the example of FIG. 50, the weight plate 5000 also comprises one or more first couplers 5004 and one or more second couplers 5002 (one of each being shown in FIG. 50). The one or more first couplers 5004 may be disposed on the first major face 912A and the one or more second couplers 5002 may be disposed on the second major face 912B. The first and second couplers 5004, 5002 may be disposed at a central region of the respective major face 912A, 912B so to be coaxially aligned with the central axis 904 (not shown in FIG. 50). The first and second couplers 5004, 5002 may extend in a direction away from a respective major face 912A, 912B, as shown in FIG. 50. In examples, the one or more couplers 5004 may be substantially similar to first couplers 208, 210 described above and the one or more couplers 5002 may be substantially similar to second couplers 302 as described above.

[0237] In the example of FIG. 50, weight plate lifter 5000 may also include reinforcing structures 5014 at an intersection of the couplers 5004, 5002 and respective major faces 912A, 912B. The reinforcing structures 5014 may be provided as reinforcing ribs configured to reinforce the junction between a respective coupler and the respective major face of the plate 902, for example, by reinforcing the structural stiffness and rigidity therebetween.

[0238] FIG. 50 also illustrates an example configuration 5050 of a multi-functional exercise system, in which a plurality of weight plates 5000 are releasably coupled to a dumbbell 200, described above, to provide an adjustable weight system. In this example, weight plates 5000 are stacked one on each other forming a group of weight plates 5000. To this end, each weight plate 5000 is releasably coupled to another weight plate of a respective grouping, with an inner most weight plate 5000 releasably coupled to dumbbell 200. For example, first coupler 208 of dumbbell 200 can be releasably coupled to a second coupler 5004 of a first weight plate 5000, a first coupler 5002 of the first weight plate 5000 can be releasably coupled to a second coupler 5004 of a second weight plate 5000, a first coupler 5002 of the second weight plate 5000 can be releasable coupled to a second coupler 5004 of a third weight plate, and so on until the final weight plate 5000.

[0239] In some examples, dumbbell 200 may comprise a second coupler (e.g., an instance of coupler 302) in place of first coupler 208. In this case, weight plates 5000 can be flipped, such that the first coupler 5002 of the first weight plate 5000 can be releasably coupled to the second coupler of the dumbbell, the second coupler 5004 of a first weight plate 5000 can be releasably coupled to a first coupler 5002 of a second weight plate 5000, and so.

[0240] FIGS. 51A and 51B illustrate an example exercise device implemented as a workout station 5100, in accordance with an example of the present disclosure. In examples, the workout station 5100 may be substantially similar to workout station 2500 of FIG. 25, except as provided herein. The workout station 2500 may be, for example, a power rack or other weight training station. In the example of FIGS. 51A and 51B, the workout station comprises a cable machine in which frame 2501 houses one or more weight stacks 2503 releasably coupled to an exercise device via one or more cable and pulley systems.

[0241] More particularly, FIGS. 51A and 51B illustrate perspective views and side views of a cable and pulley systems 5100A, 5100B in a zoomed in view of region 5150. Cable and pulley systems 5100A, 5100B comprise a cable 5110 attached to a weight stack 2503 at one end and passing through one or more pulleys 5114 (one pulley is shown for illustrative purposes). FIG. 51A illustrates cable 5110 of cable and pulley systems 5100A having a coupler 5102 disposed at the other end 5112 of cable 5110, while FIG. 51B illustrates cable and pulley systems 5100B having a coupler 5104 disposed at the other end 5112. The coupler 5102 may be implemented as second coupler 302, while coupler 5104 may be implemented as a first coupler 208 (or 210). Accordingly, exercise devices having a first coupler 208, 210 can be releasably coupled to the cable 5110 via coupler 5102 or having a second coupler 302 can be releasably coupled to the cable 5110 via coupler 5104 for a variety of exercises.

[0242] While FIGS. 51A and 51B illustrate a single cable and pulley system at a certain position of the workout station 2500, examples herein are not limited to this example only. For example, one or more pulleys 5114 may be attached to one or more of the upright posts 2502A-D, one or more of the top cross-bars 2506A-F, one or more of the base cross-bars 2504A-B, or combinations thereof. For example, one or more ends of top cross-bars 2506A-F may comprise either of cable and pulley system 5100A, 5100B. In examples, alone or in combination with preceding examples, one or one or more upright posts 2502A-D may comprise either a portion of or a cable and pulley system 5100A, 5100B. As such, the example of workout station 2500 may comprise any number of pulley and cable systems between none to six in this particular example. The number of pulley and cable systems may be dependent on the particular configuration of the workout station 2500.

[0243] In some examples, the coupler 5104 can be attached to a cable of a pulley and cable system. For example, end 5112 can be slide into a receiving end of the coupler 5104. The receiving end may comprise a hole passing through a side wall. In some examples, the hole may be tapped into the side wall, but not completely through the receiving end thereby providing one hole. A screw, pin, or other restraining device can be inserted into the hole and pressed against end 5112. End 5112 of the cable 5110 can be pinched between the restraining device and a side wall of the coupler 5104 opposite the hole, thereby securing the end 5112 in place relative to the coupler 5104. Other methods of securing end 5112 to coupler 5104 may be utilized, such as adhesives, epoxies, or other glues that can cure and secure the end 5112 relative to coupler 5104. In another example, rivets, clamps, heat shrink tubing, and the like may be utilized to secure end 5112 relative to coupler 5104.

[0244] FIG. 52 illustrates an example exercise device implemented as hook coupler 5200, in accordance with an example of the present disclosure. In examples, the hook coupler 5200 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1A-1L. For example, the hook coupler 5200 may releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0245] In the example of FIG. 52, the hook coupler 5200 comprises a coupler body 5206 having a first end 5208 (also referred to as a first surface) and a second end 5210 (also referred to as a second surface) opposite the first end 5208. In the example of FIG. 52, the coupler body 5206 comprises a hexagonal cylinder shape; however, other cylindrical shapes may be utilized as desired. A coupler 5202 may be disposed on the first end 5208 extending from the first end 5208 in a direction opposite the coupler body 5206. The coupler 5204 may be disposed at a central region of the first end 5208. The coupler 5204 may be implemented, for example, as first coupler 208 and / or 210 described above. Accordingly, coupler 5204 may releasably couple to a second coupler 302 (or the like) described above, so to releasably couple the hook coupler 5200 to a second exercise device.

[0246] In examples, the hook coupler 5200 comprises an eyelet body 5212 extending from the second end 5210. Eyelet body 5212 may include a shaft 5214 and a looped or hooked head 5216, forming an eyelet like structure, similar to hook attachment 4300 of FIG. 43. Shaft 5214 may extend from the second end 5210 in a direction opposite the coupler body 5206, for example, from a central region of the second end 5210. The shaft 5214 may be perpendicular or substantially perpendicular to the second end 5210, for example, parallel or substantially parallel to a central axis passing through the coupler body 5206. In examples, the coupler 5204 and eyelet body 5212 may be coaxially aligned with the central axis of the coupler body 5206.

[0247] In some implementations, hook coupler 5200 can be provided for cable machines, for example, where the cable comprises a second coupler 302. The examples herein can enable attachment of one or more exercise devices to a single cable (e.g., an example of which is described below in connection with FIG. 51A), such that other exercise devices may be interfaced with the hooked head 5216.

[0248] FIG. 53 illustrates an example exercise device implemented as another hooked coupler 5300, in accordance with an example of the present disclosure. Hooked coupler 5300 may be substantively similar to hooked coupler 5200, except that hooked coupler 5300 comprises coupler 5202 extending from the first end 5208. In this example, the coupler 5202 may be implemented as second coupler 302, described above.

[0249] In some implementations, hook coupler 5300 can be provided for cable machines, for example, where the cable comprises a first coupler 208 and / or 210. The examples herein can enable attachment of one or more exercise devices to a single cable (e.g., an example of which is described below in connection with FIG. 51B), such that other exercise devices may be interfaced with the hooked head 5216.

[0250] FIG. 54 is a picture of an example exercise devices implemented as a hook coupler, in accordance with examples of the present disclosure. In examples, the hook coupler 5400 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1A-1L. For example, the hook coupler 5400 may be releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0251] FIG. 54 illustrates an example implementation of hook coupler 5400 comprising a first coupler 5402 provided as a male plug that is configured to be received in a female receptacle implemented as a second coupler included in another exercise device. That is, for example, coupler 5402 may be implemented, for example, as first coupler 208 and / or 210 described above. In the example of FIG. 54, the first coupler is provided as a male plug of a quick connect (or quick release) coupling interface. Accordingly, the hook coupler of FIG. 54 can be releasably coupled to the other exercise device.

[0252] In the example of FIG. 56, the hook coupler 5400 comprises a coupler body 5406 having a first end 5408 (also referred to as a first surface) and a second end 5410 (also referred to as a second surface) opposite the first end 5408. The coupler 5402 may be disposed on the first end 5408 extending from the first end 5408 in a direction opposite the coupler body 5406. The coupler 5402 may be disposed at a central region of the first end 5408.

[0253] The coupler body 5406 can be releasably coupled to a hook attachment 4300 of FIG. 43. For example, the second surface 5410 may include a threaded coupler in a recess formed in the first surface 5408, as described above, e.g., in connection with FIGS. 47A-47B. In this example, the recess and the threaded coupler may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded hole (also known as a tapped hole) having internal threads configured to interface with a counterpart thread inserted therein. Accordingly, the hooked coupler 5400 may be configured to releasable couple to hook attachment 4300, for example, by threadedly interfacing threaded coupler 4308 with the threaded coupler of the coupler body 5406 to attach the hook attachment 4300 to the hooked coupler 5400. While FIG. 54 illustrates a male plug as first coupler 5402, hooked coupler 5400 may alternatively comprise a female receptacle (e.g., as second couplers 308) configured to receive a male plug for releasably coupling thereto.

[0254] FIG. 55 illustrates example of configuration of the multi-functional exercise system in accordance with an example, in which second exercise device 120 is implemented as a clevis coupler 5500 releasably coupled to first exercise device 110 implemented as the hooked coupler 5400. The clevis coupler 5500 may be implemented as clevis coupler 4400 or clevis coupler 4800, except that clevis coupler 5500 comprises differently shaped clevis members 5510, 5512 forming a U-shaped opening. That is, opposed to rounder triangles shown in FIGS. 44 and 48, the clevis members 5510, 5512 comprise elongated planar shaft members extending from coupler body 5506 with eyelets 5514 on the end opposite second coupler 5504 configured to receive a clevis pin 5518. The second coupler 5504, in this example, is provided as a female receptacle that is configured to receive a male plug implemented as a first coupler 5402 of hooked coupler 5400, or another first coupler included in another exercise device. That is, for example, second coupler 5504 may be implemented, for example, as second coupler 308 described above.

[0255] In some examples, the first exercise device can be implemented as an adjustable dumbbell that is configured to selectively couple to and lift a user-selected subset of weight plates from a nested set of plates, for example, in a dial-select configuration in which a user rotates a dial adjustment to select a desired weight. For example, FIG. 56 illustrates an example of adjustable dumbbell 5600, in accordance with an example of the present disclosure. In this example, the adjustable dumbbell 5600 includes a shaft 5602 configured to be gripped by a user and a pair of end assemblies 5604, 5606 coupled to opposite ends of the shaft 5602. Each end assembly 5604, 5606 can include an out surface 5612, 5614 of a respective end assembly 5604, 5606. The end assemblies 5604, 5606 can be configured to interface with a plurality of removable weight plates 5605, 5603 that are selectively retained by the adjustable dumbbell 5600 when the adjustable dumbbell is lifted from a base or cradle (not shown).

[0256] In this example, the end assemblies 5604, 5606 include a respective dial end cap that is rotatable by a user to select a desired weight. In FIG. 56, dial end cap 5607 is shown as an example disposed on outer surface 5612 of end assembly 5604. It will be understood that end assembly 5606 comprises a similar end cap assembly disposed on outer surface 5614. The dial end caps can be located on the outer surface of a respective end assembly, opposite the shaft 5602, such that the dial end caps are accessible for user adjustment when the adjustable dumbbell is seated in the base. The dial end caps can be mechanically coupled to an internal selection mechanism including, for example, selector arms, selector pins, latches, or other engagement members that, in a selected setting, extend into corresponding features (such as recesses, slots, or windows) of a subset of weight plates based on the user selected weight so that the selected subset of weight plates are retained by the adjustable dumbbell during lifting while unselected plates remain supported by the base.

[0257] In the example of FIG. 56, first couplers 208, 210, as described above, can be formed in the dial end caps. For example, each dial end cap can include a recess formed in an outer surface of the dial end cap, and a respective first coupler can be disposed within the recess, e.g., as described in connection with FIGS. 2A-2B. FIG. 56 illustrates dial end cap 5604 comprising a recess 220 formed therein and coupler 208 disposed within the recess 220. It will be appreciated that end assembly 5606 likewise includes recess 222 formed in its dial end cap and coupler 210 disposed therein. The recess can be dimensioned such that an exposed face of the first couplers 208, 210 are flush or substantially flush with adjacent portions of the outer surface of the dial end cap when the first couplers are uncoupled to a second exercise device.

[0258] In some examples, the first couplers 208, 210 can be fixed to the dial end caps such that the first couplers 208, 210 rotate with the dial end cap during weight selection. In other examples, the first couplers 208, 210 may be rotatably decoupled from the dial end caps, for example, by a bearing, bushing, or swivel interface, such that the dial end caps can rotate relative to the first couplers 208, 210 and / or relative to a second exercise device coupled to the first coupler. For example, the dial end caps can include inner hubs supporting the weight selection mechanism and an outer ring defining the recesses 220, 222. In this example, the first couplers 208, 210 can be mounted to the outer rings via rotational interfaces that permits rotation of the dial end caps without transmitting substantial torque into a coupled second exercise device.

[0259] The first couplers 208, 210 can be positioned so as not to interfere with indicia on the dial end cap, such as weight markings, and not to impede a user's ability to grip and rotate the dial end caps. In some examples, the first couplers 208, 210 may be coaxial with an axis of the shaft 5602. In other examples, the first couplers 208, 210 may be positioned off-axis, for example, at a radial offset from the shaft axis, while still being disposed on the outer side of the end assembly.

[0260] FIG. 57 illustrates an example of adjustable dumbbell 5700, in accordance with an example of the present disclosure. Adjustable dumbbell 5700 may be substantively similar to adjustable dumbbell 5600, except that dials are disposed on a shaft-side of the end assemblies 5606, 5604. That is, opposed to dial end caps, adjustable dumbbell 5700 comprises dials 5707A and 5707B formed on the shaft 5602 such that the dials 5707A, 5707B are accessible for user adjustment when the adjustable dumbbell is seated in the base. Similar to the above, dials 5707A, 5707B can be mechanically coupled to an internal selection mechanism including, for example, selector arms, selector pins, latches, or other engagement members that, in a selected setting, extend into corresponding features (such as recesses, slots, or windows) of a subset of weight plates based on the user selected weight so that the selected subset of weight plates are retained by the adjustable dumbbell during lifting while unselected plates remain supported by the base.

[0261] In the example of FIG. 57, first couplers 208, 210, as described above, can be formed in the outer surfaces 5612, 5614 of the outer most weight plate of the receptive plurality of removable weight plates 5605, 5603. For example, outer most weight plate can include a recess formed in an outer surface of the weight plate, and a respective first coupler can be disposed within the recess, e.g., as described in connection with FIGS. 2A-2B. FIG. 57 illustrates outer surface 5712 comprising a recess 220 formed therein and coupler 208 disposed within the recess 220. It will be appreciated that end assembly 5606 likewise includes recess 222 formed in the outer surface of the outer most weight plate and coupler 210 disposed therein. The recess can be dimensioned such that an exposed face of the first couplers 208, 210 are flush or substantially flush with adjacent portions of the outer surface of the dial end cap when the first couplers are uncoupled to a second exercise device.

[0262] Examples of the present disclosure are described herein. It is to be understood, however, that the disclosed examples are merely examples and other examples can take various and alternative forms. The figures are not necessarily to scale; some features could be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative bases for teaching one skilled in the art to variously employ the examples. As those of ordinary skill in the art will understand, various features illustrated and described with reference to any one of the figures can be combined with features illustrated in one or more other figures to produce examples that are not explicitly illustrated or described. The combinations of features illustrated provide representative examples for typical application. Various combinations and modifications of the features consistent with the teachings of this disclosure, however, could be desired for particular applications or implementations.

[0263] As used herein, the term “substantially” means largely but not necessarily wholly the stated characteristic, property, or condition, and includes the recited characteristic, property, or condition with insubstantial variations that do not materially affect the relevant function. By way of example, the phrase “substantially flush” means that an exposed face or component is flush with, or nearly flush with, adjacent exterior surfaces or regions such that any offset is sufficiently small to avoid snagging, interference with handling, or impairment of use. In some implementations, “substantially flush” includes an exposed face that can be recessed relative or proud relative to adjacent exterior regions by a sufficiently small amount, within manufacturing tolerances.

[0264] As used herein, the term “or” may be construed in either an inclusive or exclusive sense. Moreover, the description of resources, operations, or structures in the singular shall not be read to exclude the plural. Conditional language, such as, among others, “can,”“could,”“might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain examples include, while other examples do not include, certain features, elements and / or steps.

[0265] “A”, “an”, and “the” as used herein refers to both singular and plural referents unless the context clearly dictates otherwise. By way of example, “an exercise device” configured to be used by a user for exercise refers to one exercise device, or more than one exercise device. The terms “including” and / or “having,” as used herein, are defined as comprising (i.e., open language). The phrase “at least one of. and. ” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. As an example, the phrase “at least one of A, B, and C” includes A only, B only, C only, or any combination thereof (e.g., AB, AC, BC, or ABC). Furthermore, the term “or”, as used herein, may be construed in either an inclusive or exclusive sense. Moreover, the description of resources, operations, or structures in the singular shall not be read to exclude the plural. Conditional language, such as, among others, “can,”“could,”“might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain examples include, while other examples do not include, certain features, elements and / or steps.

[0266] Terms and phrases used in this document, and variations thereof, unless otherwise expressly stated, should be construed as open ended as opposed to limiting. Adjectives such as “conventional,”“traditional,”“normal,”“standard,”“known,” and terms of similar meaning should not be construed as limiting the item described to a given time period or to an item available as of a given time, but instead should be read to encompass conventional, traditional, normal, or standard technologies that may be available or known now or at any time in the future. The presence of broadening words and phrases such as “one or more,”“at least,”“but not limited to” or other like phrases in some instances shall not be read to mean that the narrower case is intended or required in instances where such broadening phrases may be absent.

Examples

Embodiment Construction

[0054]Dumbbell devices for weightlifting exercises typically include a shaft that can be gripped by a user. Weights may be attached, either rigidly secured or fixed, onto each end of the shaft for resistance. A user generally lifts the weighted shaft for exercise training.

[0055]One drawback of conventional dumbbell systems is the limited exercises that may be performed using a single dumbbell. Due to conventional systems typically including a single shaft located between the weighs, a user typically performs lifting exercises by gripping the shaft and keeping it at a substantially level orientation. This limitation can be disadvantageous, for example, where a user would like to perform other types of exercises that may benefit from different shaft orientation and / or grip location variation. In this case, the user may be forced to obtain different devices that safely accommodate different grip locations.

[0056]In some situations, a user may attempt to use a conventional dumbbell in al...

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of and priority to U.S. Provisional Patent Application No. 63 / 763,026, filed on Feb. 25, 2025; U.S. Provisional Patent Application No. 63 / 811,284, filed on May 23, 2025; and U.S. Provisional Patent Application No. 63 / 823,685, filed on Jun. 13, 2025, the contents of which are incorporated herein by reference in their entirety.TECHNICAL FIELD

[0002] The present disclosure generally relates to exercise equipment. In specific examples, the present disclosure relates to systems for weightlifting and resistance training that incorporate interchangeable couplers for improved functionality and adaptability.BACKGROUND

[0003] Weightlifting equipment such as dumbbells, barbells, kettlebells, and cable attachments are widely used for strength training and fitness. These devices are commonly utilized in both commercial gyms and home workout environments, supporting a variety of exercise routines aimed at improving muscular strength, endurance, and overall physical health. Typically, each device is designed for specific movements and grip positions, such as pressing, curling, or swinging, and is constructed with fixed shafts, handles, or weight plates. Users often rely on these traditional implements to perform resistance exercises, circuit training, and functional fitness routines.BRIEF DESCRIPTION OF THE DRAWINGS

[0004] The present disclosure, in accordance with one or more various examples, is described in detail with reference to the following figures. The figures are provided for purposes of illustration only and merely depict typical, non-limiting aspects of such examples.

[0005] FIGS. 1A-1L illustrates examples of various configurations of a multi-functional exercise system, in accordance with examples of the present disclosure.

[0006] FIGS. 2A-2B illustrate an example of a first exercise device that can be utilized in the multi-functional exercise system of FIGS. 1A-1L, in accordance with an example of the present disclosure.

[0007] FIGS. 2C-2F illustrate an example of quick connect coupling device that can be utilized in the multi-functional exercise system, in accordance with an example of the present disclosure.

[0008] FIGS. 3A-3K illustrate various examples of a second exercise devices that can be utilized in multi-functional exercise system of FIGS. 1A-1L, in accordance with examples of the present disclosure.

[0009] FIGS. 4A-4B illustrate an example exercise device implemented as a medicine ball, in accordance with an example of the present disclosure.

[0010] FIGS. 5A-5B illustrate an example exercise device implemented as a barbell, in accordance with an example of the present disclosure.

[0011] FIG. 6 illustrates an example exercise device implemented as a curl bar, in accordance with an example of the present disclosure.

[0012] FIG. 7 illustrates an example exercise device implemented as an end cap, in accordance with an example of the present disclosure.

[0013] FIG. 8 illustrates an example exercise device implemented as an extender, in accordance with an example of the present disclosure.

[0014] FIG. 9 illustrates an example exercise device implemented as a weight plate, in accordance with an example of the present disclosure.

[0015] FIG. 10 illustrates an example exercise device implemented as a weight belt, in accordance with an example of the present disclosure.

[0016] FIG. 11 illustrates an example exercise device implemented as another weight belt, in accordance with an example of the present disclosure.

[0017] FIG. 12 illustrates an example exercise device implemented as a weight clamp, in accordance with an example of the present disclosure.

[0018] FIG. 13 illustrates an example exercise device implemented as a cable attachment, in accordance with an example of the present disclosure.

[0019] FIG. 14 illustrates an example exercise device implemented as a cable carabineer attachment, in accordance with an example of the present disclosure.

[0020] FIG. 15 illustrates an example exercise device implemented as a carabineer cable attachment, in accordance with an example of the present disclosure.

[0021] FIG. 16 illustrates an example exercise device implemented as a carabineer chain coupler, in accordance with an example of the present disclosure.

[0022] FIG. 17 illustrates an example exercise device implemented as a kettle bell, in accordance with an example of the present disclosure.

[0023] FIG. 18 illustrates an example exercise device implemented as a loose coupler 1800, in accordance with an example of the present disclosure.

[0024] FIG. 19 illustrates an example exercise device implemented as another loose coupler, in accordance with an example of the present disclosure.

[0025] FIG. 20 illustrates an example exercise device implemented as a punching bag, in accordance with an example of the present disclosure.

[0026] FIG. 21 illustrates an example exercise device implemented as another punching bag, in accordance with an example of the present disclosure.

[0027] FIG. 22 illustrates an example exercise device implemented as a rope coupler, in accordance with an example of the present disclosure.

[0028] FIG. 23 illustrates an example exercise device implemented as a weight sled, in accordance with an example of the present disclosure.

[0029] FIG. 24 illustrates an example exercise device implemented as a weight box, in accordance with an example of the present disclosure.

[0030] FIG. 25 illustrates an example exercise device implemented as a workout station, in accordance with an example of the present disclosure.

[0031] FIG. 26 illustrates an example exercise device implemented as a band holder, in accordance with an example of the present disclosure.

[0032] FIG. 27 illustrates an example exercise device implemented as another band holder, in accordance with an example of the present disclosure.

[0033] FIGS. 28A and 28B illustrate an example exercise device implemented as claw, in accordance with an example of the present disclosure.

[0034] FIG. 29 illustrates an example exercise device implemented as dumbbell holder 2900, in accordance with an example of the present disclosure.

[0035] FIG. 30 illustrates an example exercise device implemented as another dumbbell holder, in accordance with an example of the present disclosure.

[0036] FIGS. 31A and 31B illustrates an example of dumbbell, in accordance with an example of the present disclosure.

[0037] FIG. 32 illustrates an example of dumbbell, in accordance with an example of the present disclosure.

[0038] FIG. 33 illustrates an example of another dumbbell, in accordance with an example of the present disclosure.

[0039] FIG. 34 illustrate an example exercise device implemented as a barbell, in accordance with an example of the present disclosure.

[0040] FIG. 35 illustrate an example exercise device implemented as another barbell, in accordance with an example of the present disclosure.

[0041] FIGS. 36A-36F illustrate various examples of second exercise devices that can be releasably coupled to the exercises devices of FIGS. 32-36.

[0042] FIGS. 37A-37B and 38A-38B illustrate examples exercise devices implemented as band couplers, in accordance with examples of the present disclosure.

[0043] FIGS. 39A-39B and 40A-40B illustrate examples exercise devices implemented as T-junction attachments, in accordance with examples of the present disclosure.

[0044] FIG. 41 illustrates an example exercise device implemented as weight plate lifter, in accordance with an example of the present disclosure.

[0045] FIGS. 42 and 43 illustrate example dumbbells, in accordance with examples of the present disclosure.

[0046] FIGS. 44A-49 illustrate example exercise devices implemented as clevis couplers, in accordance with examples of the present disclosure.

[0047] FIG. 50 illustrates an example exercise device implemented as a weight plate, in accordance with an example of the present disclosure.

[0048] FIGS. 51A and 51B illustrate an example exercise device implemented as a workout station, in accordance with an example of the present disclosure.

[0049] FIGS. 52 and 53 illustrate example exercise devices implemented as hook couplers, in accordance with examples of the present disclosure.

[0050] FIG. 54 is a picture of an example exercise devices implemented as a hook coupler, in accordance with examples of the present disclosure.

[0051] FIG. 55 illustrates example of configuration of the multi-functional exercise, in which a clevis coupler releasably coupled to a hooked coupler in accordance an example of the present disclosure.

[0052] FIGS. 56 and 57 illustrate examples of adjustable dumbbells, in accordance with an example of the present disclosure.

[0053] The figures are not exhaustive and do not limit the present disclosure to the precise form disclosed.DETAILED DESCRIPTION

[0054] Dumbbell devices for weightlifting exercises typically include a shaft that can be gripped by a user. Weights may be attached, either rigidly secured or fixed, onto each end of the shaft for resistance. A user generally lifts the weighted shaft for exercise training.

[0055] One drawback of conventional dumbbell systems is the limited exercises that may be performed using a single dumbbell. Due to conventional systems typically including a single shaft located between the weighs, a user typically performs lifting exercises by gripping the shaft and keeping it at a substantially level orientation. This limitation can be disadvantageous, for example, where a user would like to perform other types of exercises that may benefit from different shaft orientation and / or grip location variation. In this case, the user may be forced to obtain different devices that safely accommodate different grip locations.

[0056] In some situations, a user may attempt to use a conventional dumbbell in alternative orientations, for example, by gripping portions of the dumbbell other than the shaft (e.g., by gripping the weights directly). However, conventional dumbbells may not be designed for gripping the end weight and such misuse can damage the device and / or cause injury to the user.

[0057] Accordingly, the examples disclosed herein provide for a multi-functional exercise system that enables flexible, multi-functional user engagement with exercise devices. In examples, the multi-functional exercise system includes a first exercise device, such as a dumbbell or other weighted device that can be gripped by a user for resistance training, which comprises one or more couplers configured to releasably couple the first exercise device to a coupler of a second exercise device. By coupling the first exercise device to the second exercise device, the first exercise device can be orientated in a number of different orientations, based on the second exercise device, to provide for multi-functional user engagement.

[0058] FIGS. 1A-1L illustrates examples of various configurations of a multi-functional exercise system, in accordance with examples of the present disclosure. FIGS. 1A-1L depicts configurations 100A-100L of the multi-functional exercise system used by a user U for resistance exercises. In the examples of FIGS. 1A-1L, the multi-functional exercise system includes a first exercise device 110 orientated in various orientations for multi-functional user engagement with the first device 100. The first exercise device 110 includes one or more couplers 112 configured to releasably couple the first exercise device 110 to a coupler 122 of a second exercise device 120.

[0059] In an illustrative example, the first exercise device 110 may be provided as a dumbbell 200. FIGS. 2A-2B illustrate an example of dumbbell 200, in accordance with an example of the present disclosure. The dumbbell 200 includes a shaft 202 and weights 204, 206 coupled to each end of the shaft 202. In examples, the weights 204, 206 may be rigidly secured to the ends of shaft 202, affixed thereto, or otherwise removably coupled to the ends of shaft 202. In other examples, the weights 204, 206 may be integrated with the shaft 202 (e.g., formed of an integral body).

[0060] The weights 204, 206 may include first couplers 208, 210 disposed on a respective weight 204, 206. For example, weight 204 may comprise a first coupler 208 and weight 206 may comprise a first coupler 210. In an example, the first couplers 208, 210 may be provided on an outer surface 212, 214 (also referred to as exterior surface) of a respective weight 204, 206. In some examples, the first couplers 208, 210 may be coaxial with the shaft 202, as shown in FIGS. 2A-2B. In another example, the first couplers may be disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation). For example, first couplers 208, 210 may be provided on a side surface of weights 204, 206, such as side surface 216 and 218 in an example.

[0061] Each weight 204, 206 may comprise one or more first couplers. For example, weight 204 may comprise first coupler 208, as well as one or more additional first couplers on the outer surface 212 and / or other surfaces (e.g., side surface 216). Likewise, weight 206 may comprise first coupler 210, as well as one or more additional first couplers on the outer surface 214 and / or other surfaces.

[0062] In the example of FIGS. 2A-2B, the first couplers 208, 210 may be located in respective recesses 220, 222. Recesses 220, 222 may be formed in the respective weights 204, 206, such that the respective recesses 220, 222 extends from the outer surface 212, 214 into the weight toward the shaft 202. By providing respective recesses 220, 222, in some examples, the first couplers 208, 210 may be flush or substantially flush with their respective weights 204, 206. Providing a flush or substantially flush relation, snagging or otherwise catching of the first couplers 208, 210 on surrounding structures or articles during use can be avoided, thereby not impairing typical use of the dumbbell 200 (e.g., as shown in FIG. 1A).

[0063] In examples, one or more of first couplers 208, 210 may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, one or more of first couplers 208, 210 may be provided as male plugs configured to be received (e.g., inserted into) and couple to a female receptacle. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, one or more of first couplers 208, 210 may be configured for push-on (or snap-on) coupling. In various examples, one or more of first couplers 208, 210 may be provided may be provided as any type of air hose fitting (also known as an air-line fitting), as known in the art. In an illustrative example, one or more of first couplers 208, 210 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting.

[0064] As alluded to above, examples herein can provide for a quick connect coupling interface, which may include a male plug and female receptable receptacle configured to be connected and disconnected without tools while maintaining a load-bearing connection suitable for loads during resistance training, e.g., weight lifting. The male plug and the female receptacle may be configured as an air hose-style quick-connect coupler. FIG. 2C illustrates an example quick connect type coupling interface comprising a male plug 230 that may be implemented as one more of first couplers 208, 210 and FIGS. 2D-2F illustrates an example female receptacle 240 that may be as a second coupler configured to receive and couple to the male plug. FIGS. 2C-2F is an example of a quick connect type coupler interface, in accordance with examples herein. The quick connect type coupler can be similar to air hose fitting having functionality similar to quick connect fittings (also referred to as push fittings).

[0065] The male plug 230 can include an elongated plug body 232 defining a longitudinal axis 231 and having a proximal end 233 and a distal end 234. The distal end 234 can include a lead-in nose 235 having a tapered or rounded profile configured to guide insertion into the female receptacle. The plug body 232 can further include at least one circumferential retention feature 236 located axially between the lead-in nose 235 and the proximal end 233. The circumferential retention feature 236 can be implemented as an annular groove, a shoulder, a retention ring, or another profile configured to interface with one or more locking members of the female receptacle 240 to resist axial withdrawal when the couplers are in a locked state. In some examples, the male plug 230 may further include a sealing land formed in a cylindrical surface 237 between the retention feature 236 and the proximal end 233, such as a recessed surface extending radially from cylindrical surface 237 toward the longitudinal axis 231 and configured to retain and compress an elastomeric seal along an internal surface of the female receptacle 240. The proximal end 233 of the male plug 230 can include a mounting portion 238 configured to be secured to an exercise implement, including, for example, a threaded shank, a press-fit stem, a welded boss, a riveted post, a pinned stem, or an integrally formed body portion. In the example of FIG. 2C, the mounting portion 238 is provided as a threaded shank (also referred to as a male threaded fitting) that can interface with a female threaded fitting formed, e.g., in one of recesses 220, 222 so to removably fix the male plug 230 in a respective recess.

[0066] In the example of FIG. 2C, the male plug 230 is shown as hollow along the longitudinal axis 231 providing a channel, for example, for fluid flow along the length of the elongated plug body 232. However, in some examples, the male plug 230 may be a solid body, for example, to provide rigidity and strength to minimized deformation or breakage during use with exercise devices as described herein.

[0067] The female receptacle 240 can include a receptacle body 242 having a first end 252 and a second end 250. FIG. 2D depicts a side view of the female receptacle 240, FIG. 2E depicts female receptacle 240 when viewed from the first end 252, and FIG. 2F depicts female receptacle 240 view from the second end 250. The receptacle body 242 defining a longitudinal bore 241 configured to receive the male plug 230 along a coupling axis 243. The longitudinal bore 241 can include an opening at the first end 252 into which the male plug 230 can be inserted, a cavity configured to receive the male plug, and an internal stop surface 244 configured to limit insertion depth of the male plug through contact with the retention feature 236. The female receptacle 240 can include one or more locking members (one of which is shown as locking member 245) positioned to engage the circumferential retention feature 236 of the male plug 230 when the male plug 230 is inserted into the cavity. For example, the circumferential retention feature 236 may pass the locking members during insertion, which may operate to restrain the circumferential retention feature 236 while in the locked state. The locking members can be implemented as radially movable locking balls, rollers, pawls, or segments disposed within respective radial apertures or seats of the receptacle body 242. The locking members can be retained by an axially movable sleeve 246 that is disposed around the outer surface of receptacle body 242. The sleeve 246 can be biased by a spring 247 toward a locked position in which the sleeve 246 constrains the locking members radially inward so that the locking members engage the retention feature of the male plug and resist withdrawal.

[0068] To couple the male plug 230 and female receptacle 240, the male plug 230 is inserted into the opening of the female receptacle 240. During insertion, the sleeve 246 can be operated to compress the spring 247 which releases the locking members and lead-in nose 235 of the male plug 230 can cam the locking members radially outward against the sleeve 246. When the retention feature 236 aligns or otherwise passes the locking members, the locking members may be released so to move radially inward toward the axis 243 to restrain the retention feature 236 in a locked position. At this point, the sleeve 246 returns to the locked position under spring bias. In the locked position, the elastomeric seal (if present) can form a seal against the sealing land of the male plug 230, and the retention feature 236 and locking members can cooperate to resist axial separation during exercise use.

[0069] To decouple the male plug 230 and female receptacle 240, a user can actuate the sleeve 246 by translating the sleeve 246 axially relative to the receptacle body 242 from the locked position toward an unlocked position. In the unlocked position, the sleeve 246 permits the locking members to move radially outward, thereby disengaging from the retention feature 236 of the male plug 230 and allowing the male plug 230 to be withdrawn. The sleeve 246 can return to the locked position after release due to the spring bias. As shown in FIG. 2D, the sleeve 246 may include one or more knurled or otherwise textured surfaces 249 (e.g., rubber attachments disposed thereon) to provide tactile feel and enhance grip when operated by the user.

[0070] In the example of FIGS. 2D and 2E, female receptacle 240 can include a mounting portion 248 on an end opposite the opening configured to be secured to an exercise implement. The mounting portion 248 can include, for example, a threaded shank, a press-fit stem, a welded boss, a riveted post, a pinned stem, or an integrally formed body portion. In the example of FIGS. 2D and 2E, the mounting portion 248 is provided as a threaded bore (also referred to as a female threaded fitting) that can interface with a male threaded fitting. For example, as described below in connection with FIG. 33. In another example, the mounting portion may be provided as a threaded shank or male threaded fitting that can interface with a female threaded fitting formed, so to removably fix the female receptacle to an exercise device. For example, FIG. 56 illustrates a female receptacle having a male threaded fitting as mounting portion 248.

[0071] In various examples, a male plug 230 may be disposed in a cavity of a cylindrical housing that can be formed into, affixed, or otherwise attached to an exercise device. The cavity may be provided as the recess in which the male plug 230 is disposed. As described above, the male plug 230 may be flush or substantially flush with an upper edge of the cylindrical housing.

[0072] Quick-connect coupling interfaces, such as those of FIGS. 2C-2E may be advantageous to enable use of the exercise in a plurality of orientations. In such examples, the coupling interface can be configured to directly mate and positively lock to provide a load-bearing connection that reliably transfers exercise loads between coupled implements during dynamic movements, including movements that impose varying tensile forces, compressive forces, shear forces, and bending moments. The positive locking behavior of a quick-connect coupling interface can reduce the likelihood of inadvertent separation as compared to couplers that rely primarily on frictional engagement, flexible straps, or user-dependent tightening, while also providing repeatable engagement characteristics over repeated coupling cycles.

[0073] Moreover, the quick-connect coupling interface can provide intuitive connection and disconnection that can be performed rapidly and without extra tools. For example, the coupling can be achieved by inserting a male plug into a female receptacle to engage a retention feature in a locked state, and can be decoupled by actuation of a movable sleeve that releases the engagement to permit withdrawal of the male plug. This rapid coupling behavior can allow a user to switch among multiple attachments and grip configurations in rapid succession, enabling reconfiguration of the system between exercises while maintaining a secure, load-bearing connection during use.

[0074] Furthermore, the use of quick-connect coupling interface across multiple different exercise devices further enables a modular ecosystem in which a single exercise device can be selectively coupled to different attachments, such as rigid handles, straight bars, curl bars, rope attachments, cable-machine attachments, or other implements, to support the dumbbell in a plurality of orientations. In such examples, the coupling interface can provide a direct, load-bearing mechanical connection between the implements, thereby enabling controlled transfer of exercise loads and stable support of the dumbbell by the attachment in the selected orientation, while still permitting the dumbbell to be used as a stand-alone dumbbell when uncoupled.

[0075] As alluded to above, the one or more first couplers 208, 210 can be configured to releasably couple the dumbbell 200 to a second coupler of a second exercise device. FIGS. 3A-3K illustrate various examples of a second exercise devices 300A-300K, each of which comprises a second coupler 302A-302K (collectively referred to herein as second couplers 302 or singularly as second coupler 302) configured to be releasable coupled to either of the first couplers of the first exercise device (e.g., either of the first couplers 208, 210 of dumbbell 200).

[0076] In examples, the second couplers 302 may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, second couplers 302 may be provided as female receptacles configured to receive and couple with a male plug. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, second couplers 302 may be configured for push-on (or snap-on) coupling. Thus, second couplers 302 may be provided as quick connect, snap-fittable, and / or releasably lockable devices. In various examples, second couplers 302 may be provided may be provided as any type of air hose fitting, as known in the art. In an illustrative example, second couplers 302 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting. In an example, the second couplers 302 may be female threaded fitting configured to receive a male threaded fitting.

[0077] While the above examples provide for second couplers 302 as female couplers that receive male counterpart couplers, examples herein are not limited to this configuration. For example, second couplers 302 may be provided as male couplers, in which case the one or more first couplers 208, 210 may be provided as female couplers.

[0078] As noted above, the second exercise device may be implemented as various exercises devices known in the art, except that at least one second coupler 302 is provided. FIGS. 3A-3K depict certain non-limiting examples of the types of exercises devices 300A-300K that may be implemented as the second exercise device 120 shown in FIGS. 1B-1L. By providing flexibility to couple various types of exercises devices to the dumbbell 200, the multi-functional exercise system can provide for flexible, multi-functional engagement by the user U, in which the dumbbell 200 can be used in various orientations without risk of damage to the devices or injury to user U.

[0079] For example, FIG. 3A illustrates a second exercise device 120 implemented as a straight bar attachment 300A. Straight bar attachment 300A comprises a second coupler 302A disposed perpendicular or substantially perpendicular to a shaft 304A. The shaft 304A comprises grips attachments 306A (e.g., knurled portions of shaft 304A and / or rubber attachments disposed thereon) provided, for example, on each end of shaft 304A. As shown in FIG. 3A, the second coupler 302A is affixed between the grip attachments 306A, for example, at a central portion of the shaft 304A. In some examples, the shaft 304A may be configured to slidably rotate about its axis relative to the second coupler 302A. For example, the second coupler 302A may be attached to the shaft 304A using rotating swivel center mechanism 308A (e.g., a collar that encircles the shaft 304A) that provides a pivot point about the axis of the shaft 304A.

[0080] Referring to FIG. 1K, an illustrative example of configuration 100K of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a straight bar attachment 300A releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip attachments 306A of straight bar attachment 300A, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second couplers 302A. The user U may be able to perform bicep curls, deadlifts, or any resistance exercise desired.

[0081] FIG. 3B illustrates an example a second exercise device 120 implemented as an abdominal wheel attachment 300B. Abdominal wheel attachment 300B comprises a second coupler 302B situated coaxially with a shaft 304B. The shaft 304B comprises a grip attachment 306B (e.g., knurled portions of shaft 304A and / or rubber attachments disposed thereon). As shown in FIG. 3B, the second coupler 302B is provided at an end of the shaft 304B. In some examples, the second coupler 302B may be configured to rotate relative to the shaft 304B, for example, via ball bearings or other mechanism that enables rotational movement.

[0082] Referring to FIG. 1G, an illustrative example of configuration 100G of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a pair of abdominal wheel attachments 300B releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, abdominal wheel attachments 300B can be releasably coupled to weights 204, 206 via coupling of second couplers 302B to first couplers 208, 210. The user U can grip the grip attachments 306B to perform abdominal exercise.

[0083] FIG. 3C illustrates an example a second exercise device 120 implemented as a handle attachment 300C. Handle attachment 300C comprises a handle body 304C having a grip attachment 306C on one end and a second coupler 302C disposed at another end opposite the grip attachment 306B (e.g., knurled portions of shaft 304A and / or rubber attachments disposed thereon). The handle body 304C may have a tubular or cylindrical body in a rounded square or rounded rectangular configuration, as shown in FIG. 3C. In some examples, the second coupler 302C can be affixed to handle body 304C. In another example, the second coupler 302C may be configured to slidably rotate about an axis of the end of handle body 304C relative to end of the handle body 304C. For example, the second coupler 302C may be attached to the end of handle body 304C using rotating swivel center mechanism 308C (e.g., a collar that encircles the end of handle body 304C) that provides a pivot point about the axis of the end of the handle body 304C.

[0084] Referring to FIG. 1G, an illustrative example of configuration 100C of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as one or more handle attachments 300C releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In these examples, one or more handle attachments 300C can be releasably coupled to one or more of weights 204, 206 via coupling of second couplers 302C to first couplers 208, 210. The user U can grip the grip attachments 306C to perform various exercises, such as but not limited to, deadlifts, bicep curls, and overhead press, as shown in FIG. 1C.

[0085] FIG. 3D illustrates an example a second exercise device 120 implemented as a weight collar attachment 300D. Weight collar 300D comprises a collar body 304D affixed to a second coupler 302D. In some examples, a clamping mechanism 306D can be provided configured to reduce the diameter of an opening 308D of the collar body 304D through user operation. For example, a user may rotate clamping mechanism 306D to cause the diameter of opening 308D to be reduced in size, so to cause a clamping down on another element within the opening 308D to provide a releasable friction fit therebetween. In another example, the clamping mechanism 306D may be configured for a pinch-fit, whereby clamping mechanism 306D can be rotated via a threaded fitting so to extend into opening 308D and pinch an element between the clamping mechanism 306D and an opposing surface within the opening 308D.

[0086] Referring to FIG. 1L, an illustrative example of configuration 100L of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as one or more weight collar attachments 300D releasably coupled to the first exercise devices 110 implemented as dumbbells 200. In this example, one or more weight collar attachments 300D can be releasably coupled to either of weights 204, 206 via coupling of second couplers 302D to first couplers 208, 210. The user U can insert a barbell, curl bar, or other weight-bearing bar into the openings 308D and operate clamping mechanism 306D to releasably attach the weight collar attachments 300D to the weight-bearing bar for performing various exercises, such as but not limited to, bench press, skull crushers, and the like.

[0087] FIG. 3E illustrates a second exercise device 120 implemented as a rope attachment 300E. Rope attachment 300E comprises a second coupler 302E disposed perpendicular or substantially perpendicular to an axis of rope 304E. The rope 304E comprises end caps 306E provided, for example, on each end of rope 304E. The second coupler 302A can be slidably attached to the rope 304E via a collar 308E attached to the second coupler 302E. The collar 308E may be configured to encircle a radial direction of the rope 304E and permit the second coupler 302A to slidably rotate about the axis of the rope 304E relative to the rope 304E, as well as to slide longitudinally relative to the rope 304E (e.g. permit movement of second coupler 302A from one end to the other end of rope 304E).

[0088] Referring to FIG. 1F, an illustrative example of configuration 100F of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a rope attachment 300E releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip portions of rope 304E and / or ends caps 306E and permit the dumbbell 200 to hang in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302E. The user U may be able to perform various exercises, such as bicep curls, as shown in FIG. 1F.

[0089] FIG. 3F illustrates a second exercise device 120 implemented as a curl bar attachment 300F. Curl bar attachment 300F comprises a bent shaft 304F (e.g., not straight along a central axis) having a portions bent at obtuse angles relative to each other. A second coupler 302F is disposed at a central portion of the bent shaft 304F extending perpendicular or substantially perpendicular to the central portion. The bent shaft 304F comprises grips attachments 306F (e.g., knurled portions of bent shaft 304F and / or rubber attachments disposed thereon) provided, for example, at one or more portions of the bent shaft 304A. As shown in FIG. 3F, the second coupler 302F is affixed between two grip attachments 306F. End caps 310F may be provided as well. In some examples, the second coupler 302F may be fixedly attached to the bent shaft 304F. In another example, second coupler 302F may be configured to slidably rotate about the central portion of the bent shaft 304F. For example, the second coupler 302F may be attached to the bent shaft 304F using rotating swivel center mechanism 308F (e.g., a collar that encircles the central portion of bent shaft 304F) that provides a pivot point about the axis of the bent shaft 304F.

[0090] Referring to FIG. 1D, an illustrative example of configuration 100D of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a curl bar attachment 300F releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip attachments 306F of curl bar attachment 300F, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302F. The user U may be able to perform bicep curls, deadlifts, or any resistance exercise desired.

[0091] FIG. 3G illustrates an example a second exercise device 120 implemented as a kettle bell attachment 300G. Kettle bell attachment 300G comprises a handle body 304G having a grip attachment 306G on one end and a second coupler 302G disposed at another end opposite the grip attachment 306G (e.g., knurled portions of handle body 304G and / or rubber attachments disposed thereon). The handle body 304G may have a tubular or cylindrical body in a triangular configuration, as shown in FIG. 3G. In some examples, the second coupler 302G can be affixed to handle body 304G. In another example, the second coupler 302G may be configured to slidably rotate about an axis of the end of handle body 304G relative to end of the handle body 304G. For example, the second coupler 302G may be attached to the end of handle body 304G using rotating swivel center mechanism 308G (e.g., a collar that encircles the end of handle body 304G) that provides a pivot point about the axis of the end of the handle body 304G.

[0092] Referring to FIG. 1G, an illustrative example of configuration 100G of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a kettle bell attachment 300G releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In these examples, kettle bell attachment 300G can be releasably coupled to one or more of weights 204, 206 via coupling of second coupler 302G to either of first couplers 208, 210. The user U can grip the grip attachments 306G to perform various exercises in a kettle bell configuration, as shown in FIG. 1G.

[0093] FIG. 3H illustrates a second exercise device 120 implemented as a lat bar attachment 300H. Lat bar attachment 300H comprises a bent shaft 304H having a portions that are bent at obtuse angles relative to a longitudinal central portion. A second coupler 302G is disposed on the central portion of the bent shaft 304H extending perpendicular or substantially perpendicular to the central portion. In some examples, the bent shaft 304H can comprise grips attachments (e.g., knurled portions and / or rubber attachments disposed thereon) provided, for example, on the bent portion. In some examples, the second coupler 302G may be fixedly attached to the bent shaft 304H. In another example, second coupler 302G may be configured to slidably rotate about the central portion of the bent shaft 304H. For example, the second coupler 302G may be attached to the bent shaft 304H using rotating swivel center mechanism 308G (e.g., a collar that encircles the central portion of bent shaft 304H) that provides a pivot point about the axis of the bent shaft 304H.

[0094] Referring to FIG. 1J, an illustrative example of configuration 100J of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a lat bar attachment 300G releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the bent portions of bent shaft 304H 304H, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302G. The user U may be able to perform various resistance exercises, as shown in FIG. 1J.

[0095] FIG. 3I illustrates a second exercise device 120 implemented as a horizontal v-bar attachment 300I. Horizontal v-bar attachment 300I comprises a pair of v-plates 304I parallel or substantially parallel to each other and attached via a pair of grip rods 306I and a base rod 310I. A second coupler 302I is disposed on a central portion of the base rod 310I extending perpendicular or substantially perpendicular to an axis of the base rod 310I. In some examples, the grip rods 306I can comprise knurled portions and / or rubber attachments disposed thereon for gripping. In some examples, the second coupler 302I may be fixedly attached to the base rod 310I. In another example, second coupler 302I may be configured to slidably rotate about the central portion of the base rod 310I. For example, the second coupler 302I may be attached to the base rod 310I using rotating swivel center mechanism 308I (e.g., a collar that encircles the central portion of base rod 310I) that provides a pivot point about the axis of the base rod 310I.

[0096] Referring to FIG. 1H, an illustrative example of configuration 100H of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a horizontal v-bar attachment 300I releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip rods 306I in a horizontal orientation, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302I. The user U may be able to perform various resistance exercises, as shown in FIG. 1H.

[0097] FIG. 3J illustrates a second exercise device 120 implemented as a vertical v-bar attachment 300I. Vertical v-bar attachment 300I comprises a v-shaped shaft 304J having grip attachments 306J at ends of the v-shaped shaft 304J and a second coupler 302J disposed a bend of the v-shaped shaft 304J between the grip attachments 306J (e.g., knurled portions of v-shaped shaft 304J and / or rubber attachments disposed thereon). In some examples, the second coupler 302J may be fixedly attached to the v-shaped shaft 304J. In another example, second coupler 302I may be configured to slidably rotate about the v-shaped shaft 304J. For example, the second coupler 302J may be attached to the v-shaped shaft 304J using rotating swivel center mechanism 308J (e.g., a collar that encircles the v-shaped shaft 304J) that provides a pivot point about the v-shaped shaft 304J. The vertical v-shaped attachment 300J may also include end caps 310J.

[0098] Referring to FIG. 1I, an illustrative example of configuration 100I of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a vertical v-bar attachment 300I releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip rods 306J in a vertical orientation, while the dumbbell 200 also hangs in a vertical orientation via releasably coupling of one of first couplers 208, 210 and second coupler 302J. The user U may be able to perform various resistance exercises, as shown in FIG. 1I.

[0099] FIG. 3K illustrates an example a second exercise device 120 implemented as a dual end connector attachment 300K. Dual end connector attachment 300K comprises a pair of second couplers 302K situated coaxially at ends of a shaft 304K. In some examples, the second couplers 302K may be configured to rotate relative to the shaft 304K, for example, via ball bearings or other mechanism that enables rotational movement.

[0100] Referring to FIG. 1B, an illustrative example of configuration 100B of the multi-functional exercise system is shown, in which second exercise device 120 is implemented as a dual end connector attachments 300K releasably coupled to a pair of first exercise devices 110 each implemented as a dumbbell 200. In this example, dual end connector attachment 300K can be releasably coupled to one of weights 204, 206 via coupling of second couplers 302K to respective first couplers 208, 210. Thus, a pair of dumbbells 200 can be releasably coupled as shown in FIG. 1B, which the user U can use to perform various exercises as desired.

[0101] FIGS. 4A-4B illustrate an example exercise device implemented as a medicine ball 400, in accordance with an example of the present disclosure. FIG. 4A depicts a perspective view from the bottom left side and FIG. 4B depicts a perspective view from the top right side of the medicine ball 400. In examples, the medicine ball 400 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the medicine ball 400 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the medicine ball 400 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In some examples, the medicine ball may include a metallic core and elastomeric features on an exterior (e.g., outer surface) thereof.

[0102] The medicine ball 400 comprises a spherical body 402 having an outer surface, an axis 408, and an equator 410 about the axis 408 (e.g., surrounding the axis 408 in a radial direction). The medicine ball 400 includes one or more couplers 404A-404F (collectively referred to herein as couplers 404 or singularly as coupler 404) provided in the outer surface thereof. In examples, the one or more couplers 404 may be substantially similar to first couplers 208, 210 described above. In examples, where the medicine ball 400 is implemented as a second exercise device 120, the one or more couplers 404 may be substantially similar to second couplers 302 as described above.

[0103] In examples, medicine ball 400 may comprise a plurality of couplers 404 distributed amongst the outer surface of the body 402. For example, the plurality of couplers 404 may be symmetrically arrayed about the spherical body 402 of the medicine ball 400. In the example of FIG. 4, six couplers 404 are provided, a first subset of which are symmetrically arrayed about the axis 408 (e.g., at 90 degrees relative to each other) and a second subset of which are provided at the opposite axial ends along the axis 408 (also referred to as spherical caps). Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 404 may be located in respective recesses 406.

[0104] FIGS. 5A-4E illustrate an example exercise device implemented as a barbell 500, in accordance with an example of the present disclosure. In examples, the barbell 500 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the barbell 500 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the barbell 500 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0105] The barbell 500 comprises a shaft 502 and grips 504A and 504B. In examples, the shaft 502 may be straight or substantially straight. Collars 506A and 506B may be located adjacent to each grip 504A and 504B. Weighted sleeves 508A and 508B are located axially outward of the respective collars 506A and 506B at each end of the shaft 502. Couplers 510A and 510B are located in weighted sleeves 508A and 508B, respectively. In examples, the couplers 510 may be substantially similar to first couplers 208, 210 described above. In examples, where the barbell 500 is implemented as a second exercise device 120, the one or more couplers 510 may be substantially similar to second couplers 302 as described above. Similar to the couplers described above in connection with FIGS. 2A-2F, the couplers 510a, 510B may be located in respective recesses 512A, 512B.

[0106] FIG. 6 illustrates an example exercise device implemented as a curl bar 600, in accordance with an example of the present disclosure. In examples, the curl bar 600 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the curl bar 600 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the curl bar 600 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0107] The curl bar 600 comprises a bent shaft 602 and grips 604A-604D. In examples, the bent shaft 602 may not be straight, such that the bent shaft 602 comprises a plurality of portions that are bent at obtuse angles relative to each other. Each of grips 604A-604D are disposed on respective bent portions as shown in FIGS. 6A-6C. Collars 606A and 606B may be located adjacent to grips 604A and 604B and collars 606A and 606B may be coaxially aligned with each other (e.g., aligned along a common axis). Weighted sleeves 608A and 608B are located axially outward of the respective collars 606A and 606B at each end of the bent shaft 602. Couplers 610A and 610B are located in weighted sleeves 608A and 608B, respectively. In examples, the couplers 610 may be substantially similar to first couplers 208, 210 described above. In examples, where the curl bar 600 is implemented as a second exercise device 120, the one or more couplers 610 may be substantially similar to second couplers 302 as described above. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 610a, 610B may be located in respective recesses 612A, 612B.

[0108] FIG. 7 illustrates an example exercise device implemented as an end cap 700, in accordance with an example of the present disclosure. In examples, the end cap 700 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the end cap 700 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the end cap 700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In an particular example, the end cap 700 may be a barbell end cap that can be releasably coupled to an end of barbell 500 (as shown in FIG. 7) and / or curl bar 600 (e.g., at an end of a respective weighted sleeve).

[0109] In the example of FIG. 7, the end cap 700 comprises cap shaft 702 and a top plate 704 at a first end of the cap shaft. The cap shaft 702 may include a second end comprising a coupler 706. In examples, the coupler 706 may be substantially similar to first couplers 208, 210 or the second couplers 302, depending on the implementation. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 706 may be located in a recess 708.

[0110] FIG. 8 illustrates an example exercise device implemented as an extender 800, in accordance with an example of the present disclosure. In examples, the extender 800 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the extender 800 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the extender 800 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the extender 800 may be a barbell extender that can be releasably coupled to an end of barbell 500 and / or curl bar 600 (e.g., at an end of a respective weighted sleeve).

[0111] In the example of FIG. 8, the extender 800 comprises an extender shaft 802 having couplers 804 and 806 coaxially aligned on respective ends of the extender shaft 802. In the example of FIG. 8, the coupler 804 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. In this case, similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 804 may be located in a recess 808. Thus, coupler 804 may be releasably coupled to an end of barbell 500, curl bar 600, or other weight-bearing bar and enable releasably coupling to yet another exercise device, such as dumbbell 200 or any of second exercise devices 300A-300K.

[0112] FIG. 9 illustrates an example exercise device implemented as a weight plate 900, in accordance with an example of the present disclosure. In examples, the weight plate 900 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the weight plate 900 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the weight plate 900 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the weight plate 900 may be releasably coupled to an end of barbell 500, curl bar 600 (e.g., at an end of a respective weighted sleeve), and / or an extender 800.

[0113] In the example of FIG. 9, the weight plate 900 comprises a flat or substantially flat plate 902 having major face 912, a central axis 904, an outer rim 906 defining an equator surrounding the plate 902 about the central axis 904. The outer rim 906 comprises an outer surface 908, which maybe generally cylindrical. The outer rim 906 may have a greater axial dimension than that of the plate 902 (e.g., the diameter of plate 902 is equal to or less than an inner surface of the outer rim 906). In examples, the weight plate 904 may be made of dense rubber and / or metal according to a desired amount of weight attributed to the weight plate. Weight plates, such as weight plate 900, are typically available in 2.5 lbs., 5 lbs., 10 lbs., 25 lbs., 35 lbs., and 45 lbs.

[0114] The weight plate 900 also comprises one or more couplers 910A-910C (collectively referred to herein as couplers 910 or singularly as coupler 910). In examples, the one or more couplers 910 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. In some examples, at least one coupler 910 may be may be provided in the major face 912 aligned with the axis 904. Additionally, in some examples, a plurality of couplers 910 may be symmetrically spaced apart the equator on the outer rim. In the particular example of FIG. 9, the weight plate 900 comprises four couplers symmetrically spaced apart from the equator, for example, couplers 910B and 910C are shown and two others, opposite couplers 910B and 910C respectively, can be provided on the outer surface 908 (e.g., one axially aligned with coupler 910B and another axially aligned with coupler 910C). The weight plate 900 can also include two couplers coaxially aligned with the plate 902, such as coupler 910A and another coupler on the back surface of major face 912 axially aligned with axis 904. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 910 may be located in respective recesses 914A-914F.

[0115] FIG. 10 illustrates an example exercise device implemented as a weight belt 1000, in accordance with an example of the present disclosure. In examples, the weight belt 1000 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the weight belt 1000 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the weight belt 1000 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0116] In the example of FIG. 10, the weight belt 1000 comprises a band 1002 and a chain 1004 that, collectively, form a continuous loop. The chain 1004 may be provided as interlocking chains, as shown in FIG. 10. The weight belt 1000 also comprises a coupler 1006 mounted to the chain 1004, for example, one of the interlocking chains. In examples, the coupler 1006 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1006 may be located in respective recesses 1008.

[0117] FIG. 11 illustrates an example exercise device implemented as another weight belt 1100, in accordance with an example of the present disclosure. Weight belt 1100 may be substantially similar to weight belt 1000. For example, the weight belt 1100 comprises a band 1102 and a chain 1104 that, collectively, form a continuous loop. The weight belt 1000 also comprises a coupler 1106 mounted to the chain 1104. The difference between weight belt 1000 and weight belt 1100 is that the chain 1104 is longer than the chain 1004.

[0118] FIG. 12 illustrates an example exercise device implemented as a weight clamp 1200, in accordance with an example of the present disclosure. In examples, the weight clamp 1200 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the weight clamp 1200 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the weight clamp 1200 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the weight clamp 1200 may be releasably coupled to an end of barbell 500, curl bar 600 (e.g., at an end of a respective weighted sleeve), and / or an extender 800.

[0119] In the example of FIG. 12, the weight clamp 1200 comprises a hinged clamp 1202 configured to be releasably secured to a shaft 1204 (e.g., weight sleeve and / or shaft of barbell 500, curl bar 600, extender 800, and / or dumbbell 200). The hinged clamp 1200 may include a pivot point 1206 having an axis of rotation that is substantially parallel with the shaft 1204. The hinged clamp 1202 may include a bottom seat 1208 and a top clamp 1210 that can be rotated about pivot point 1206 relative to the bottom seat 1208 to secure the shaft 1204 therebetween. The hinged clamp 1202 may also include a latch mechanism comprising a catch 1212 and a latch arm 1214 configured to interlock and secure the top clamp 1210 to the bottom seat 1208.

[0120] The weight clamp 1200 also comprises a coupler 1216 mounted to the hinged clamp 1202. For example, as shown in FIGS. 12A-12F, the coupler 1216 can be mounted to the bottom seat 1208 and extends in a direction perpendicular or substantially perpendicular to the pivot point 1206 opposite the top clamp 1210. However, in another example, the coupler 1216 may be attached to the top clamp 1210. In examples, where the weight clamp 1200 is implemented as a first exercise device 110, the coupler 1216 may be substantially similar to first couplers 208, 210 or second couplers 302, depending on the implementation. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1216 may be located in a recess 1218.

[0121] FIG. 13 illustrates an example exercise device implemented as a cable attachment 1300, in accordance with an example of the present disclosure. In examples, the cable attachment 1300 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the cable attachment 1300 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the cable attachment 1300 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the cable attachment 1300 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the cable attachment 1300 to a cable of the cable machine and releasably coupling another exercise device to the cable attachment 1300.

[0122] In the example of FIG. 13, the cable attachment 1300 comprises a plate 1302 and one or more couplers 1304A-1304C (collectively referred to herein as couplers 1304 or singularly as coupler 1304) extending from plate 1302. In some examples, a first subset of couplers 1304 can be disposed on a first side 1306 of plate 1302 and extending perpendicularly or substantially perpendicularly from the first side 1306 away from plate 1302. Additionally, in some examples, a second subset of couplers 1304 can be disposed on a second side 1308 of plate 1302. In the particular example of FIG. 13, two couplers 1304 are provided on the first side 1306 and one coupler 1304 is provided on the second side 1308. In examples, the one or more couplers 1304 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1304 may be located in respective recesses 1310A-1310C. That is, for example, the couplers 1304 may include a cylindrical housing extending from first side 1306 (or second side 1308). The cylindrical housing may include a recess in the form of a cavity in which a male plug (or similar coupling element) is disposed. As described above, the male plug may be flush or substantially flush with an upper edge of the cylindrical housing.

[0123] FIG. 14 illustrates an example exercise device implemented as a cable carabineer attachment 1400, in accordance with an example of the present disclosure. In examples, the cable carabineer attachment 1400 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the cable carabineer attachment 1400 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the cable carabineer attachment 1400 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the cable carabineer attachment 1400 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the cable carabineer attachment 1400 to a cable of the cable machine and releasably coupling another exercise device to the cable carabineer attachment 1400.

[0124] In the example of FIG. 14, the cable carabineer attachment 1400 comprises a plate 1402 and one or more couplers 1404A-1404B (collectively referred to herein as couplers 1404 or singularly as coupler 1404) extending from plate 1402. In some examples, the couplers 1404 can be disposed on a first side 1406 of plate 1402 and extending perpendicularly or substantially perpendicularly from the first side 1406 away from plate 1402. Additionally, in some examples, one or more carabineers 1412 can be disposed (e.g., affixed thereto) on a second side 1408 of plate 1402. In the particular example of FIG. 14, two couplers 1404 are provided on the first side 1406 and one carabineer 1412 is provided on the second side 1408. In examples, the one or more couplers 1404 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1404 may be located in respective recesses 1410A-1410B.

[0125] FIG. 15 illustrates an example exercise device implemented as a carabineer cable attachment 1500, in accordance with an example of the present disclosure. In examples, the carabineer cable attachment 1500 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the carabineer cable attachment 1500 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the carabineer cable attachment 1500 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the carabineer cable attachment 1500 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the carabineer cable attachment 1500 to a cable of the cable machine and releasably coupling another exercise device to the carabineer cable attachment 1500.

[0126] In the example of FIG. 15, the carabineer cable attachment 1500 comprises a plate 1502 and one or more couplers 1504 extending from plate 1502. In some examples, the couplers 1504 can be disposed on a second side 1508 of plate 1502 and extending perpendicularly or substantially perpendicularly from the second side 1508 away from plate 1502. Additionally, in some examples, one or more carabineers 1512A-1512B (collectively referred to herein as carabineers 1512 or singularly as carabineer 1512) can be disposed (e.g., affixed thereto) on a first side 1506 of plate 1502. In the particular example of FIG. 15, one coupler 1504 is provided on the second side 1508 and two carabineers 1512A and 1512B are provided on the first side 1506. In examples, the one or more couplers 1504 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1504 may be located in a recess 1510.

[0127] FIG. 16 illustrates an example exercise device implemented as a carabineer chain coupler 1600, in accordance with an example of the present disclosure. In examples, the carabineer chain coupler 1600 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the carabineer chain coupler 1600 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the carabineer chain coupler 1600 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. In a particular example, the carabineer chain coupler 1600 can be utilized by a user for exercise using a cable machine, for example, by releasably coupling the carabineer chain coupler 1600 to a cable of the cable machine and releasably coupling another exercise device to the carabineer chain coupler 1600.

[0128] In the example of FIG. 16, the carabineer chain coupler 1600 comprises a chain 1602 having a carabineer 1606 disposed on a first end and a coupler 1604 disposed on a second end of the chain 1602. In examples, the chain 1602 may be interlocking chains, in which the carabineer 1606 and coupler 1604 can be affixed to respective interlocking chains (e.g., integrated therewith or securedly connected thereto). In examples, the one or more couplers 1604 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 1604 may be located in a recess 1608.

[0129] FIG. 17 illustrates an example exercise device implemented as a kettle bell 1700, in accordance with an example of the present disclosure. In examples, the kettle bell 1700 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. For example, the kettle bell 1700 may be used as the first exercise device 110 and releasably coupled to one or more second exercise devices 120. In another example, the kettle bell 1700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0130] In the example of FIG. 17, the kettle bell 1700 comprises a weighted bell 1702 having a base 1704 and a handle 1706 configured to be griped by a user. The kettle bell 1700 also includes a first horn 1708 and a second horn 1710 affixed (e.g., securedly attached to or integrated with the weight bell 1702) extending from the weight bell 1702 opposite the base 1704 to a respective corner 1712, 1714 attached to each end of the handle 1706. The first and second horns 1708, 1710 couple the weighted bell 1702 to the handle 1706. The kettle bell 1700 may be made of a metallic core having a metallic outer surface, rubber outer surface, other suitable materials as known in the art, or combinations thereof. In examples, the handle 1706 may include a grip 1720, such as a knurled surface and / or rubber attachments disposed thereon.

[0131] The kettle bell 1700 also comprises one or more couplers 1716 disposed on the outer surface thereof. For example, the one or more couplers 1716 may be distributed about the kettle bell 1700. In an illustrative example, the couplers 1716 may be disposed on the surface the weighted bell 1702, the base 1704, the handle 1706, the corner 1712, the corner 1714, or combinations thereof. In some examples, the couplers 1716 may be symmetrically arrayed about the surface of the weighted bell 1702 (e.g., about an equator along a plane that is substantially parallel to an axis 1718 of the handle 1706). In the example of FIG. 17, eight couplers 1716 are provided, where a respective coupler 1716 is provided in the corner 1712, the corner 1714, base 1704, and handle 1706 and four couplers 1716 are symmetrically arrayed about the surface of the weight bell 1702. In examples, the one or more couplers 1716 may be implemented as first couplers 208, 210 described above, second couplers 302 described above, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 1716 may be located in respective recesses 1722.

[0132] FIG. 18 illustrates an example exercise device implemented as a loose coupler 1800, in accordance with an example of the present disclosure. In examples, the loose coupler 1800 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the loose coupler 1800 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0133] In the example of FIG. 18, the loose coupler 1800 comprises a band 1802 configured to be used by a user for exercise. The band 1802 comprises one or more couplers 1804 disposed on one or more ends of the band 1802. The band 1802 may be one of a resistance band, strength band, and rope. In the example of FIG. 18, band 1802 comprises two couplers 1804 provided at each end of the band 1802. The one or more couplers 1804 may be implemented as second couplers 302 as described above.

[0134] FIG. 19 illustrates an example exercise device implemented as another loose coupler 1900, in accordance with an example of the present disclosure. In examples, the loose coupler 1900 may be implemented as the first exercise device 110 of FIGS. 1A-1L. For example, the loose coupler 1900 may be used as the first exercise device 110 and releasably coupled to a second exercise device 120.

[0135] In the example of FIG. 19, the loose coupler 1900 comprises a band 1902 configured to be used by a user for exercise. The band 1902 comprises one or more couplers 1904 disposed on one or more ends of the band 1902. The band 1902 may be one of a resistance band, strength band, and rope. In the example of FIG. 19, band 1902 comprises two couplers 1904 provided at each end of the band 1902. The one or more couplers 1904 may be implemented as first couplers 208, 210 described above. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 1904 may be located in respective recesses 1906. In some examples, the couplers 1904 may be implemented as either of first couplers 208, 210 and second couplers 302, or combinations thereof.

[0136] FIG. 20 illustrates an example exercise device implemented as a punching bag 2000, in accordance with an example of the present disclosure. In examples, the punching bag 2000 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0137] In the example of FIG. 21, the punching bag 2000 comprises a body 2002 having an outer surface 2004 defining a bag. The outer surface may comprise leather, synthetic materials, canvas or other materials that resist abrasion from punching. The body 2002 may be configured to be hung from a first end 2006 via one or more couplers 2010. In the example of FIG. 20, the first end 2006 may be connected to an end of a chain 2008, which can comprise a coupler 2010 on another end of the chain 2008 opposite the body 2002. The chain 2008 may comprise interlocking chains. The coupler 2010 may be implemented as either of first couplers 208, 210, and second coupler 302. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 2010 may be located in a recess 2012.

[0138] FIG. 21 illustrates an example exercise device implemented as another punching bag 2100, in accordance with an example of the present disclosure. In examples, the punching bag 2100 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0139] In the example of FIG. 21, the punching bag 2100 comprises a body 2102 having an outer surface 2104 defining a bag. The outer surface may comprise leather, synthetic materials, canvas or other materials that resist abrasion from punching. The body 2102 may be configured to be hung from a first end 2106 via one or more couplers 2110. In the example of FIG. 21, a coupler 2110 may be provided at the first end 2106 (e.g., securedly attached or otherwise integrated therewith the first end 2106). The punching bag 2100 may also include a chain 2108 comprising couplers 2110 disposed at the ends of the chain 2108. The chain 2108 may comprise interlocking chains.

[0140] The couplers 2110 may be implemented as first couplers 208, 210, second coupler 302 or combinations thereof. For example, in the case of FIG. 21, coupler 2110 at the first end 2106 may be a first coupler 208 configured to releasably connect to a coupler 2110 at an end 2114 of chain 2108 as a second coupler 302. The coupler at end 2116 of chain 2108 may be either one of first couplers 208, 210 or second coupler 302. Alternatively, coupler 2110 at the first end 2106 may be a second coupler 302 configured to releasably connect to a coupler 2110 at an end 2114 of chain 2108 as a first coupler 208. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2110 may be located in respective recesses 2112.

[0141] FIG. 22 illustrates an example exercise device implemented as a rope coupler 2200, in accordance with an example of the present disclosure. In examples, the rope coupler 2200 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0142] In the example of FIG. 22, the rope coupler 2200 comprises a U-shaped shaft 2202 and one or more couplers 2204 attached to the U-shaped body 2202. The U-shaped body 2202 can include a first end 2206, a second end 2208, and a curved midsection 2210 between the first and second ends 2206, 2208. In examples, the U-shaped body 2202 may comprise a tubular shaft of material (e.g., metal or other suitable material) bent to form a U-shape as shown in FIG. 22.

[0143] The rope coupler 2200 may include one or more couplers 2204 provided at one or more of the midsection 2210, the first end 2206, and the second end 2208. In the example of FIG. 22, couplers 2204 are provided at the first end 2206, the second end 2208, and the midsection 2210. In some examples, a coupler 2204 (e.g., the coupler 2210 at midsection 2210) may be attached to the body 2202 using rotating swivel center mechanism 2214 (e.g., a collar that encircles the shaft of body 2202) that provides a pivot point about the axis of the shaft. The couplers 2204 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2204 may be located in respective recesses 2212.

[0144] FIG. 23 illustrates an example exercise device implemented as a weight sled 2300, in accordance with an example of the present disclosure. In examples, the weight sled 2300 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0145] In the example of FIG. 23, the weight sled 2300 is configured to be used by a user for exercise, for example, for sled pushes. The weight sled 2300 comprises a base 2302, one or more handles 2304, and a weight holder 2306. The base 2302 may include skis 2308 on a bottom side configured to slide along a floor or surface due to pushing forces from a user. The one or more handles 2304 may be provided as upright posts connected to the base 2302 on a top side and extend substantially perpendicular to the base 2302 away from the bottom side. The handles 2304 may be configured for gripping by a user for exerting a pushing force. In some examples, as shown in FIG. 23, the weight sled 2300 may include an anchor bar 2312 connected to the base 2302 via upright posts 2314.

[0146] The weight sled 2300 also comprises one or more couplers 2310. For example, the one or more handles 2304 may comprise one or more couplers 2310 attached thereto. In the example of FIG. 23, the weight sled 2300 comprises three couplers 2310, one attached to each upright post defining handles 2304 and another attached to anchor bar 2312. The couplers 2310 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2310 may be located in respective recesses 2316.

[0147] FIG. 24 illustrates an example exercise device implemented as a weight box 2400, in accordance with an example of the present disclosure. In examples, the weight box 2400 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L.

[0148] In the example of FIG. 24, the weight box 2400 is configured to be used by a user for exercise. The weight box 2400 comprises a cuboid body 2402 comprising a plurality of surface, surfaces 2404A-2404C are shown in FIG. 24 as illustrative examples. The weight box 2400 may be similar to a pylo box comprising a wooden core structure and optional cover. The weight box 2400 also comprises one or more couplers 2406 distributed about the surfaces 2404A-2404F. For example, one or more of surfaces 2404A-2404C may include one or more couplers 2406 provided thereon. In the example of FIG. 24, six couplers 2406 are provided, where one coupler is provided on surface 2404A and two couplers 2406 are provided on surface 2404. Opposing facing surfaces may have similar configurations of couplers. The couplers 2410 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2410 may be located in respective recesses 2408.

[0149] FIG. 25 illustrates an example exercise device implemented as a workout station 2500, in accordance with an example of the present disclosure. In examples, the workout station 2500 may be implemented as either of the first or second exercise device 110, 120 of FIGS. 1A-1L. The workout station 2500 may be, for example, a power rack or other weight training station.

[0150] In the example of FIG. 25, the workout station 2500 is configured to be used by a user for exercise, for example. The workout station 2500 comprises a frame consisting of a plurality of upright posts 2502A-D (also referred to as structure support posts) connected to a plurality of base cross-bars 2504A-B configured to support the workout station 2500 on a floor or surface, and a plurality of top cross-bars 2506A-F. The workout station 2500 may include a plurality of attachments configured to enable various exercises. In the example of FIG. 25, the plurality of attachments includes seats 2508 for sitting upon and weight stacks 2510 which can be utilized for cable based exercises.

[0151] The workout station 2500 also comprises one or more couplers 2512. For example, one or more couplers 2512 may be attached to one or more of the upright posts 2502A-D, one or more of the top cross-bars 2506A-F, or combinations thereof. In the example of FIG. 25, the workout station 2500 comprises ten couplers 2512. For example, cross-bars 2506A and 2506B each comprise two couplers 2512 attached to a central region of the respective cross-bar that extend in direction parallel to a plane formed by the cross-bars 2506A and 2506B. Cross-bars 2506C and 2506D also include two couplers 2512 at each end of a respective cross bar. The couplers 2512 on cross-bars 2506C and 2506D extend substantially perpendicular to the length of the respective cross-bar toward the base cross-bars 2504A-B. Likewise, cross-bars 2506E and 2506F each comprise one coupler 2512 at a respective attached to each upright post defining handles 2504 and another attached to anchor bar 2506. The couplers 2512 may be implemented as first couplers 208, 210, second coupler 302, or combinations thereof. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2512 may be located in respective recesses.

[0152] While a specific configuration is shown in FIG. 25, the scope of the present disclosure is not intended to be limited to this configuration, which is provided as an illustrative example. For example, any configuration of a workout station may be utilized, such that the workout station comprises one or more couplers 2512 for providing points of attachment for one or more other exercise devices.

[0153] FIG. 26 illustrates an example exercise device implemented as a band holder 2600, in accordance with an example of the present disclosure. In examples, the band holder 2600 may be configured to be used by a user for exercise, for example, to hold a band (e.g., a resistance band, strength band, rope, or the like).

[0154] In the example of FIG. 26, the band holder 2600 comprises a ball joint 2602 and a looped holder 2604. The looped holder 2604 may be formed of a tubular shaft shaped into a loop, as shown in FIG. 26, having ends attached to an axial end of ball joint 2602. The ball joint 2602 may comprises one or more couplers 2606 disposed on an axial end of the ball joint 2602 opposite the looped holder 2604 along an axis 2608. In the example of FIG. 26, the coupler 2606 may be implemented as one of first couplers 208, 210 described above. Similar to the couplers described above in connection with FIGS. 2A-2B, the coupler 2606 may be located in a recess 2610.

[0155] FIG. 27 illustrates an example exercise device implemented as another band holder 2700, in accordance with an example of the present disclosure. In examples, the band holder 2700 may be configured to be used by a user for exercise, for example, to hold a band (e.g., a resistance band, strength band, rope, or the like).

[0156] In the example of FIG. 27, the band holder 2700 comprises a ball joint 2702 and a looped holder 2704. The looped holder 2704 may be formed of a tubular shaft shaped into a loop, as shown in FIG. 27, having ends attached to an axial end of ball joint 2702. The ball joint 2702 may comprises one or more couplers 2706 disposed on an axial end of the ball joint 2702 opposite the looped holder 2704 along an axis 2708. In the example of FIG. 27, the coupler 2706 may be implemented as a second coupler 302 described above.

[0157] FIG. 28 illustrates an example exercise device implemented as claw 2800, in accordance with an example of the present disclosure. In examples, the claw 2800 may be configured to be used by a user for exercise, for example, to hold an exercise device. In the example of FIG. 28, claw 2800 is shown holding a weight of a dumbbell D.

[0158] In the example of FIG. 28, the claw 2800 comprises a shaft 2802 with an axis 2804. A coupler 2806 is provided on an axial end 2812 of the shaft 2802. In examples, talons 2808 extend arcuately from an opposite axial end 2810. The talons are configured to releasably grip the weight of dumbbell D via a deformation force that deforms the talons 2808 during insertion of the weight and a spring force that restores the talons 2808 to a resting state. In the resting state, ends 2814 of talons 2808 grip an inner surface of the weight so to securely hold the weight within the talons 2808. The coupler 2806 may be implemented as one of first couplers 208, 210 or second coupler 302. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2806 may be located in a recess 2816.

[0159] FIG. 29 illustrates an example exercise device implemented as dumbbell holder 2900, in accordance with an example of the present disclosure. In examples, the dumbbell holder 2900 may be configured to be used by a user for exercise, for example, to hold an exercise device. In the example of FIG. 29, dumbbell holder 2900 is shown holding a weight of a dumbbell D.

[0160] In the example of FIG. 29, the dumbbell holder 2900 comprises a structure having shaft 2902 with an axis 2904, first base plate 2906, and a second base plate 2908 orientated perpendicular or substantially perpendicular relative to the first base plate 2906. The first and second bases 2906 and 2908 may be provided on an axial end 2910 of the shaft 2902. The structure also includes bars 2912 arcuately extending from the first and second base plates 2906 and 2908, for example, from respective ends of respective base plates. The bars 2912 can be attached to a support ring 2914 configured to releasably encircle a shaft of the dumbbell D. The support ring 2914 may be coaxially aligned with the axis 2904 and have an inner radius that is less than a cross-sectional dimension of the weight of the dumbbell D.

[0161] In examples, a coupler 2916 may be provided on an axial end 2918 of the shaft 2902 opposite the support ring 2914. The coupler 2916 may be implemented as one of first couplers 208, 210 or second coupler 302. Similar to the couplers described above in connection with FIGS. 2A-2B, the couplers 2916 may be located in a recess 2920.

[0162] FIG. 30 illustrates an example exercise device implemented as another dumbbell holder 3000, in accordance with an example of the present disclosure. In examples, the dumbbell holder 3000 may be configured to be used by a user for exercise, for example, to hold an exercise device. In the example of FIG. 30, dumbbell holder 3000 is shown holding a weight of a dumbbell D.

[0163] In the example of FIG. 30, the dumbbell holder 3000 comprises a structure having a first base plate 3006, and a second base plate 3008 orientated perpendicular or substantially perpendicular relative to the first base plate 3006. The first and second bases 3006 and 3008 may be provided on an axial end 3010 of the axis 3002. The structure also includes bars 3012 arcuately extending from the first and second base plates 3006 and 3008, for example, from respective ends of respective base plates. The bars 3012 can be attached to a support ring 3014 configured to releasably encircle a shaft of the dumbbell D. The support ring 3014 may be coaxially aligned with the axis 3002 and have an inner radius that is less than a cross-sectional dimension of the weight of the dumbbell D.

[0164] In the example of FIG. 30, a looped handle 3004 may be provided on an axial end opposite the support ring 3014. The looped handle 3004 may connect to ends of one of base plates 3006 or 3008 (e.g., base plate 3006 shown in FIG. 30). The looped handle 3004 may be configured to be gripped by a user. In some examples, the looped handle 3004 may include a grip, such as a knurled surface and / or rubber attachments disposed thereon.

[0165] FIG. 31A illustrates an example of dumbbell 3100, in accordance with an example of the present disclosure. The dumbbell 3100 may be substantially similar to dumbbell 200, except as provided herein. Accordingly, dumbbell 3100 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0166] The weights 204, 206 may also include first couplers 208, 210 disposed on a respective weight 204, 206, as described above in connection with FIGS. 2A-2B. In the example of FIG. 31A, the first couplers 208, 210 includes internal bars located in respective recesses 220, 222. Internal bar 3102 included in weight 204 is shown in FIG. 31A as an illustrative example, and one or more similar internal bars may be located in weight 206. The internal bars may be smaller (e.g., smaller diameter) than the shaft. In the example of FIG. 31A, the internal bar 3102 is perpendicular to an axis of the shaft 202 and the internal bar on weight 206 may be similarly orientated. Additionally, internal bars may be located side surfaces of the weights and these internal bars may be parallel, perpendicular, or at other angles relative to the axis of the shaft 202.

[0167] The internal bars may be configured to releasably couple to second couplers similar to the examples described above. However, in the case of internal bars, the second coupler may be implemented as a carabineer 3104 as shown in FIG. 31B. Carabineer 3104 may also be coupled or integrated into to a second exercise device, such as the straight bar attachment 3106 and handle attachments 3108. In another example, the second coupler may be a rope or other elongated device that can be looped around the internal bar, for example, by a knot or other method.

[0168] FIG. 32 illustrates an example of dumbbell 3200, in accordance with an example of the present disclosure. The dumbbell 3200 may be substantially similar to dumbbell 200, except as provided herein. Accordingly, dumbbell 3200 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0169] The weights 204, 206 may include first couplers 3208, 3210 disposed on a respective weight 204, 206. In the example of FIG. 32, weights 204, 206 include respective recesses 3220, 3222 configured to receive and releasably connect to first couplers 3208, 3210. To this end, the weights 204, 206 may include first threaded couplers 3202, 3204 in respective recesses 3220, 3222. For example, weight 204 may comprise recess 3220 having a first threaded coupler 3202 formed in the outer surface 212 and weight 206 may comprise recess 3222 having a first threaded coupler 3204 in the outer surface 214 (as shown in FIGS. 2A and 2B). In the above examples, recess 3220, 3222 and respective first threaded couplers 3202, 3204 may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein.

[0170] The first couplers 3208, 3210 may be included as part of coupler bodies 3224, 3226. Coupler bodies 3224, 3226 may include respective shafts 3214, 3216 (e.g., cylindrical bodies) and respective second threaded couplers 3206, 3212, each of which is coaxially aligned with respective first couplers 3208, 3210. The second threaded couplers 3206, 3212 may be referred to as male threaded shafts, such as a threaded bolt that can be received by and interface with a threaded hole. The coupler bodies 3224, 3226 may comprise recesses in the form of cavities (cavity 3232 is shown as an example) extending from respective outer edges 3228, 3230 of the coupler bodies 3224, 3226 toward the second threaded couplers 3206, 3212. The couplers 3208, 3210 may be disposed within the respective cavities. As described above, the couplers 3208, 3210 may be flush or substantially flush with an upper edge of the cylindrical housing.

[0171] In examples, the second threaded couplers 3206, 3212 may be configured to threadedly interface with respective first threaded couplers 3202, 3204 to attach first couplers 3208, 3210 to a respective weight 204, 206 within a respective recess 3220, 3222. For example, recess 3220 of weight 204 may receive coupler body 3224 and first threaded coupler 3202 may interface with second threaded coupler 3206 to releasably connect the coupler 3208 to the weight 204. Likewise, recess 3222 of weight 206 may receive coupler body 3226 and first threaded coupler 3204 may interface with second threaded coupler 3212 to releasably connect the coupler 3210 to the weight 206.

[0172] In some examples, the recesses 3220, 3222, and as such the first threaded couplers 3202, 3204, may be coaxial with the shaft 202, as shown in FIG. 32. The second threaded couplers 3206, 3212 may be coaxial with a shaft 3214, 3216 of respective first couplers 3208, 3210. Thus, when the first couplers 3208, 3210 are received by the recesses 3220, 3222, the first couplers 3208, 3210 can be coaxial with the shaft 202.

[0173] In another example, recess may be disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation). For example, one or more recesses having first threaded couplers may be provided a side surface, such as side surface 216 and / or 218. As such, one or more of first couplers 3208, 3210 may be disposed on a side surface of weights 204, 206 via the recesses.

[0174] First couplers 3208, 3210 (which may be substantially similar to couplers 208, 210) may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, one or more of first couplers 208, 210 may be provided as male plugs configured to be received (e.g., inserted into) and couple to a female receptacle. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, one or more of first couplers 208, 210 may be configured for push-on (or snap-on) coupling. In various examples, one or more of first couplers 208, 210 may be provided may be provided as any type of air hose fitting (also known as an air-line fitting), as known in the art. In an illustrative example, one or more of first couplers 208, 210 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting.

[0175] The one or more first couplers 3208, 3210 can be configured to releasably couple the dumbbell 3200 to a second coupler of a second exercise device, as described above. For example, FIGS. 3A-3K illustrate various examples of a second exercise devices 300A-300K, each of which comprises a second coupler 302 configured to be releasable coupled to either of the first couplers 3208, 3210 of dumbbell 3200 in a manner similar to first couplers 208, 210 described above.

[0176] FIG. 33 illustrates an example of another dumbbell 3300, in accordance with an example of the present disclosure. The dumbbell 3300 may be substantially similar to dumbbell 3200, except as provided herein. Accordingly, dumbbell 3300 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0177] The weights 204, 206 may include first couplers 3308, 3310 disposed on a respective weight 204, 206. In the example of FIG. 33, weights 204, 206 first threaded couplers 3202, 3304 configured to releasably connect to first couplers 3308, 3310. For example, weight 204 may comprise a first threaded coupler 3302 provided on the outer surface 212 and weight 206 may comprise a first threaded coupler 3304 provided the outer surface 214. In the above examples, first threaded couplers 3302, 3304 may be referred to as male threaded shafts, such as threaded bolts having external threads configured to interface with a counterpart internal thread of a recess that the bolt is inserted therein.

[0178] The first couplers 3308, 3310 may be included as part of coupler bodies 3324, 3326, which may be substantively similar to coupler bodies 3226, 3224 described above. Coupler bodies 3324, 3326 may include respective shafts 3314, 3316 and respective recesses 3220, 3222 having second threaded couplers 3306, 3312 formed therein. The recesses 3220, 3222 and shafts 3314, 3316 may be coaxially aligned with respective first couplers 3308, 3310. The second threaded couplers 3306, 3312 may be provided as female threaded receptacles, such as threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein. The coupler bodies 3324, 3326 may comprise recesses in the form of cavities extending from respective outer edges of the coupler bodies toward the second threaded couplers, as described above. The couplers 3308, 3310 may be disposed within the respective cavities. As described above, the couplers 3308, 3310 may be flush or substantially flush with an upper edge of the cylindrical housing

[0179] In examples, the second threaded couplers 3306, 3312 may be configured to threadedly interface with respective first threaded couplers 3302, 3304 to attach first couplers 3308, 3310 to a respective weight 204, 206 within a respective recess 3320, 3322. For example, recess 3320 of weight 204 may receive coupler body 3324 and first threaded coupler 3302 may interface with second threaded coupler 3306 to releasably connect the coupler 3308 to the weight 204. Likewise, recess 3322 of weight 206 may receive coupler body 3326 and first threaded coupler 3304 may interface with second threaded coupler 3312 to releasably connect the coupler 3310 to the weight 206.

[0180] In some examples, the first threaded couplers 3202, 3304 may be coaxial with the shaft 202, as shown in FIG. 32. The second threaded couplers 3306, 3312 may be coaxial with a shaft 3314, 3316 of respective first couplers 3308, 3310. Thus, the first couplers 3308, 3310 can be coaxial with the shaft 202.

[0181] In another example, first threaded couplers may be disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation). For example, one or more first threaded couplers may be provided on a side surface, such as side surface 216 and / or 218.

[0182] First couplers 3308, 3310 (which may be substantially similar to couplers 208, 210) may be provided as any type of coupler configured for releasably coupling to a counterpart coupler. In an example, one or more of first couplers 208, 210 may be provided as male plugs configured to be received (e.g., inserted into) and couple to a female receptacle. In some example, one or more of first couplers 208, 210 may be configured for quick connect (or quick release) coupling. In another example, one or more of first couplers 208, 210 may be configured for push-on (or snap-on) coupling. In various examples, one or more of first couplers 208, 210 may be provided may be provided as any type of air hose fitting (also known as an air-line fitting), as known in the art. In an illustrative example, one or more of first couplers 208, 210 may be provided as threaded fitting, such as but not limited to, a ¼-inch NPT (National Pipe Thread) fitting.

[0183] The one or more first couplers 3308, 3310 can be configured to releasably couple the dumbbell 3300 to a second coupler of a second exercise device, as described above. For example, FIGS. 3A-3K illustrate various examples of a second exercise devices 300A-300K, each of which comprises a second coupler 302 configured to be releasable coupled to either of the first couplers 3308, 3310 of dumbbell 3300 in a manner similar to first couplers 208, 210 described above.

[0184] FIG. 34 illustrate an example exercise device implemented as a barbell 3400, in accordance with an example of the present disclosure. The barbell 3400 may be substantially similar to barbell 500, except as provided herein. Accordingly, barbell 3400 includes a substantially straight shaft 502. In examples, barbell 3400 may also include grips (e.g., grips 504A and 504B) and collars (e.g., collars 506A and 508B) located adjacent to the grips, as shown in FIGS. 5A-5B. In some examples, barbell 3400 may also include weighted sleeves (e.g., weighted sleeves 508A and 508B) at each end of the shaft 502.

[0185] Barbell 3400 also includes first threaded couplers 3402, 3404 on axial ends of the shaft 502. The first threaded couplers 3402, 3404 may be configured to releasably connect to coupler bodies 3424, 3426. For example, the barbell 3400 may comprise first threaded coupler 3402 provided on a one axial end of the shaft 502 and first threaded coupler 3404 on an opposite axial end of the shaft 502. In the above examples, first threaded couplers 3402, 3404 may be referred to as male threaded shafts, such as threaded bolts having external threads configured to interface with a counterpart internal thread of a recess that the bolt is inserted therein. In some examples, the first threaded couplers 3402, 3404 may be located at ends of weighted sleeves (e.g., axial ends of weighted sleeves 508A and 508B).

[0186] The coupler bodies 3424, 3426 may be substantially similar to coupler bodies 3324, 3326 described above in connection with FIG. 33. As such, second threaded couplers of each coupler bodies 3424, 3426 may be configured to threadedly interface with respective first threaded couplers 3402, 3404 to attach first couplers to a respective end of shaft 502. The one or more first couplers can be configured to releasably couple the barbell 3400 to a second coupler of a second exercise device, as described above.

[0187] In some examples, the barbell 3400 may be implemented as a curl bar. In this case, the shaft may not be straight as described above in connection with FIGS. 6A-6E.

[0188] FIG. 35 illustrate an example exercise device implemented as another barbell 3500, in accordance with an example of the present disclosure. The barbell 3500 may be substantially similar to barbell 500, except as provided herein. Accordingly, barbell 3500 includes a substantially straight shaft 502. In examples, barbell 3500 may also include grips (e.g., grips 504A and 504B) and collars (e.g., collars 506A and 508B) located adjacent to the grips, as shown in FIGS. 5A-5B. In some examples, barbell 3500 may also include weighted sleeves (e.g., weighted sleeves 508A and 508B) at each end of the shaft 502.

[0189] Barbell 3500 also includes first threaded couplers 3502, 3504 formed in recesses on the axial ends of the shaft 502. The first threaded couplers 3502, 3504 may be configured to receive and releasably connect to coupler bodies 3524, 3526 (e.g., similar to recesses 3220, 3222 and first threaded couplers 3202, 3204 described above in connection with FIG. 32). For example, the barbell 3500 may comprise first threaded coupler 3502 in a recess provided on one axial end of the shaft 502 and first threaded coupler 3504 in another recess on an opposite axial end of the shaft 502. In the above examples, first threaded couplers 3502, 3504 may be referred to as a female threaded receptacle, such as a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein. In some examples, the first threaded couplers 3502, 3504 may be located at ends of weighted sleeves (e.g., axial ends of weighted sleeves 508A and 508B).

[0190] The couplers bodies 3524, 3526 may be substantially similar to couplers bodies 3224, 3226 described above in connection with FIG. 32. As such, second threaded couplers of each coupler bodies 3524, 3526 may be configured to threadedly interface with respective first threaded couplers 3502, 3504 to attach first couplers to a respective end of shaft 502. The one or more first couplers can be configured to releasably couple the barbell 3500 to a second coupler of a second exercise device, as described above.

[0191] In some examples, the barbell 3500 may be implemented as a curl bar. In this case, the shaft may not be straight as described above in connection with FIGS. 6A-6E.

[0192] FIG. 36 illustrates various examples of second exercise devices 3600A-3600F, each of which comprises a second coupler 3602 configured to be releasable coupled to one or more of the examples described in connection with FIGS. 32-36.

[0193] For example, FIG. 36 illustrates end cap 3600A having a shaft 3604A and a second coupler 3602A connected thereto. The second coupler 3602A may be formed in a recess 3606A of a coupler body 3608A extending substantially perpendicular from the shaft 3604A. In this case, the second coupler 3602A may be a female threaded receptacle that can interface with a male threaded shaft. For example, second coupler 3602A may releasably couple the end cap 3600A by interfacing with one of first threaded couplers 3302, 3304, 3402, or 3404. In an example, second coupler 3602A may be configured to slidably rotate about the central portion of the shaft 3604A. For example, the second coupler 3602A may be attached to the shaft 3604A using rotating swivel center mechanism 3610A (e.g., a collar that encircles the central portion of shaft 3604A) that provides a pivot point about the axis of the bent shaft 3604A. In some examples, the second coupler 3602A can be affixed to end cap 3600A.

[0194] FIG. 36 also illustrates end cap 3600B having a shaft 3604B and a second coupler 3602B connected thereto. The second coupler 3602B may be formed on coupler body 3608B extending substantially perpendicular from the shaft 3604B. In this case, the second coupler 3602B may be a male threaded shaft that can interface with a female threaded receptacle. For example, second coupler 3602B may releasably couple the end cap 3600B by interfacing with one of first threaded couplers 3202, 3204, 3502, or 3504. In an example, second coupler 3602B may be configured to slidably rotate about the central portion of the shaft 3604B. For example, the second coupler 3602B may be attached to the shaft 3604B using rotating swivel center mechanism 3610B (e.g., a collar that encircles the central portion of shaft 3604B) that provides a pivot point about the axis of the bent shaft 3604B. In some examples, the second coupler 3602E can be affixed to end cap 3600B.

[0195] FIG. 36 also illustrates handle attachment 3600C having a handle body 3604C including a second coupler 3602C disposed at an end. The handle body 3604C may include a grip attachment (e.g., grip attachment 306C of FIG. 3C) on an end opposite the second coupler 3602C. The handle body 3604D may have a tubular or cylindrical body in a rounded square or rounded rectangular configuration, as shown in FIG. 36. The second coupler 3602C may be formed on coupler body 3608C extending substantially perpendicular from the handle body 3604C. In this case, the second coupler 3602C may be a male threaded shaft that can interface with a female threaded receptacle. For example, second coupler 3602C may releasably couple the handle 3600C by interfacing with one of first threaded couplers 3202, 3204, 3502, or 3504. In some examples, the second coupler 3602C can be affixed to handle body 3604C. In another example, the second coupler 3602C may be configured to slidably rotate about an axis of the end of handle body 3604C relative to end of the handle body 3604C. For example, the second coupler 3602C may be attached to the end of handle body 3604C using rotating swivel center mechanism 3610C (e.g., a collar that encircles the end of handle body 3604C) that provides a pivot point about the axis of the end of the handle body 3604C.

[0196] FIG. 36 also illustrates handle attachment 3600D having a handle body 3604D including a second coupler 3602D disposed at an end. The handle body 3604D may include a grip attachment (e.g., grip attachment 306C of FIG. 3C) on an end opposite the second coupler 3602D. The handle body 3604D may have a tubular or cylindrical body in a rounded square or rounded rectangular configuration, as shown in FIG. 36. The second coupler 3602C may be formed in a recess 3606C of a coupler body 3608C extending substantially perpendicular from the shaft 3604A. In this case, the second coupler 3602C may be a female threaded receptacle that can interface with a male threaded shaft. For example, second coupler 3602C may releasably couple the handle attachment 3600D by interfacing with one of first threaded couplers 3302, 3304, 3402, or 3404. In some examples, the second coupler 3602D can be affixed to handle body 3604C. In another example, the second coupler 3602D may be configured to slidably rotate about an axis of the end of handle body 3604D relative to end of the handle body 3604C. For example, the second coupler 3602D may be attached to the end of handle body 3604D using rotating swivel center mechanism 3610D (e.g., a collar that encircles the end of handle body 3604C) that provides a pivot point about the axis of the end of the handle body 3604C.

[0197] FIG. 36 illustrates straight bar 3600E having a shaft 3604E and a second coupler 3602E connected thereto and grip attachments 3612E, 3614E (e.g., grip attachment 306C of FIG. 3C) on axial ends of the shaft 3604E. The second coupler 3602E may be formed in a recess 3606E of a coupler body 3608E extending substantially perpendicular from the shaft 3604E. In this case, the second coupler 3602E may be a female threaded receptacle that can interface with a male threaded shaft. For example, second coupler 3602E may releasably couple the straight bar 3600E by interfacing with one of first threaded couplers 3302, 3304, 3402, or 3404. In an example, second coupler 3602E may be configured to slidably rotate about the central portion of the shaft 3604E. For example, the second coupler 3602E may be attached to the shaft 3604E using rotating swivel center mechanism 3610E (e.g., a collar that encircles the central portion of shaft 3604A) that provides a pivot point about the axis of the bent shaft 3604E. In some examples, the second coupler 3602E can be affixed to straight bar 3600E.

[0198] FIG. 36 also illustrates straight bar 3600F having a shaft 3604F and a second coupler 3602F connected thereto and grip attachments 3612F, 3614F (e.g., grip attachment 306C of FIG. 3C) on axial ends of the shaft 3604F. The second coupler 3602F may be formed on coupler body 3608F extending substantially perpendicular from the shaft 3604F. In this case, the second coupler 3602F may be a male threaded shaft that can interface with a female threaded receptacle. For example, second coupler 3602F may releasably couple the straight bar 3600E by interfacing with one of first threaded couplers 3202, 3204, 3502, or 3504. In an example, second coupler 3602F may be configured to slidably rotate about the central portion of the shaft 3604F. For example, the second coupler 3602F may be attached to the shaft 3604F using rotating swivel center mechanism 3610F (e.g., a collar that encircles the central portion of shaft 3604F) that provides a pivot point about the axis of the bent shaft 3604F. In some examples, the second coupler 3602F can be affixed to straight bar 3600F.

[0199] FIGS. 37A-37B illustrate an example exercise device implemented as a band coupler 3700, in accordance with an example of the present disclosure. In examples, the band coupler 3700 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the band coupler 3700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110.

[0200] In the example of FIGS. 37A-37B, the band coupler 3700 comprises a band 3702 configured to be used by a user for exercise. The band 3702 comprises one or more rings 3706 disposed on one or more ends of band 3702. For example, the band 3702 may be a looped band (e.g., an elastic looped band, a resistance looped band, strength looped band, or the like) that can be looped around the one or more rings 3706 at one or more ends of the band 3702. In another example, the one or more rings 3706 may be removably coupled or clipped into the loop. One or more carabineers 3708 may releasably couple one or more couplers 3704 to the one or more rings 3706. In the example of FIGS. 37A-37B, band coupler 3704 comprises two couplers 3704 attached to two carabineers 3708 that releasably coupler to two rings 3706 at each end of the band 3702. In the example of FIG. 37, the one or more couplers 3704 may be implemented as second couplers 302 as described above.

[0201] Furthermore, FIG. 37B illustrates one or more band couplers 3700 releasably coupled to one or more dumbbells 200. In this case, band coupler 3700 may be considered a second exercise device 120 and dumbbell 200 may be considered a first exercise device 110. For example, two dumbbells 200 are shown, each of which includes a shaft 202 and weights 204, 206 coupled to each end of the shaft 202. The weights 204, 206 include first couplers 208, 210 (only couplers 210 is shown in FIG. 37B), as described above. The couplers 3704 of the band coupler 3600 may be configured to releasable couple to first couplers 208, 210. In the example of FIG. 37B, two band couplers 3700 are shown coupled to two dumbbells 200.

[0202] FIGS. 38A-38B illustrates an example exercise device implemented as another band coupler 3800, in accordance with an example of the present disclosure. In examples, the band coupler 3800 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the band coupler 3700 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. Band coupler 3800 may be substantively similar to band coupler 3700, except that band coupler 3800 comprises one or more couplers 3804 releasably coupled to the one or more rings 3706. The one or more couplers 3804 may be implemented as first couplers 208 and / or 210, described above. In this case, the one or more band couplers 3800 may be releasably coupled to one or more dumbbells 200 having second couplers 302 included on weights 204, 206.

[0203] FIGS. 39A-39B illustrates an example exercise device implemented as a T-junction attachment 3900, in accordance with an example of the present disclosure. In examples, the T-junction attachment 3900 may be implemented as the first exercise device 110 of FIGS. 1A-1L. For example, the T-junction attachment 3900 may be used as the first exercise device 110 and releasably couple to a second exercise device 120 (e.g., triangular handle attachment 3920).

[0204] T-junction attachment 3900 comprises a T-shaped body 3908 having a first shaft 3910 and a second shaft 3912 disposed perpendicular or substantially perpendicular to first shaft 3910 at a first end of the second shaft 3912. The second shaft 3912 may comprise a first coupler 3904 on the second end of second shaft 3912 opposite the first shaft 3910. As shown in FIGS. 39A-39B, the second shaft 3912 can be affixed between the ends of the first shaft 3910, for example, at a central portion of the first shaft 3910. One or more second couplers 3902 may be disposed at one or more ends of the first shaft 3910. For example, second couplers 3902 are shown disposed at both ends of the first shaft 3910. The first couplers 3904 may be implemented as first couplers 208 and / or 210, described above, and couplers 3902 may be implemented as second couplers 302, described above.

[0205] In the illustrative example of configuration 3915 of the multi-functional exercise system is shown, in which the T-junction attachment 3900 is implemented as the first exercise device 110 releasably coupled to a triangular handle attachment 3920. The triangular handle attachment 3920 comprises a handle body 3924 having a grip region 3926 on one end and a coupler 3922 disposed at another end opposite the grip region 3926 (e.g., knurled portions of handle body 3924 and / or rubber attachments disposed thereon). The handle body 3924 may have a tubular or cylindrical body in a triangular configuration, as shown in FIGS. 39A-39B. In some examples, the coupler 3922 can be affixed to handle body 3924. In another example, the coupler 3902 may be configured to slidably rotate about an axis of the end of handle body 3924 relative to end of the handle body 3924. For example, the coupler 3922 may be attached to the end of handle body 3924 using rotating swivel center mechanism 3928 (e.g., a collar that encircles the end of handle body 3924) that provides a pivot point about the axis of the end of the handle body 3924. In this example, the coupler 3922 may be implemented as a second coupler 302, as described above, that can releasably couple to coupler 3904 of the T-junction attachment 3900 (or other first exercised device 120) as shown in FIGS. 39A-39B.

[0206] Additionally, the T-junction attachment 3900 may be used as the second exercise device 120 and releasably couple to another first exercise device 110, while simultaneously implemented as a first exercise device 110 and releasably couple to a second exercise device 120. That is, as shown in FIG. 39B, the T-junction attachment 3900 can be releasably coupled to one or more dumbbells 200 (e.g., a first exercised device 110), while also releasably coupled to the triangular handle attachment 3900. Accordingly, the T-junction attachment 3900 can enable shared attachments with multiple different exercises devices, such as those described herein.

[0207] FIGS. 40A-40B illustrates an example exercise device implemented as another T-junction attachment 4000, in accordance with an example of the present disclosure. In examples, the T-junction attachment 4000 may be implemented as the second exercise device 120 of FIGS. 1A-1L. For example, the T-junction attachment 4000 may be used as the second exercise device 120 and releasably coupled to a first exercise device 110. T-junction attachment 4000 may be substantively similar to T-junction attachment 3900, except that T-junction attachment 4000 comprises a coupler 4002 on an end of second shaft 3912 and one or more couplers 4004 on one or more ends of shaft 3910. In this example, the one or more couplers 4004 may be implemented as first couplers 208 and / or 210, described above, while the coupler 4002 may be implemented as the second coupler 302, described above.

[0208] In the illustrative example of configuration 3935 of the multi-functional exercise system is shown, in which the T-junction attachment 4000 is implemented as the second exercise device 120 releasably coupled to a dumbbell 200 as a first exercise device 120. For example, as shown in 40A-40B, coupler 4002 of the T-junction attachment 3900 can be releasably coupled to one of first couplers 208, 210 of the dumbbell 200.

[0209] Additionally, the T-junction attachment 4000 may be used as the first exercise device 110 and releasably couple to another second exercise device 120, while simultaneously implemented as a second exercise device 120 and releasably coupled to a first exercise device 110. That is, as shown in FIG. 40B, the T-junction attachment 4000 can be releasably coupled to one or more handle attachments 4020 (e.g., a second exercised device 120), while also releasably coupled to the dumbbell 200. The handle attachments 4020 may include a shaft 4024 having a handle region 4026 thereon and a coupler 4022 disposed at an end of the shaft. The coupler 4022, in this example, may be implemented as a second coupler 302.

[0210] The triangular handle attachment 3920 comprises a handle body 3924 having a grip region 3926 on one end and a coupler 3922 disposed at another end opposite the grip region 3926 (e.g., knurled portions of handle body 3924 and / or rubber attachments disposed thereon). The handle body 3924 may have a tubular or cylindrical body in a triangular configuration, as shown in FIG. 39. In some examples, the coupler 3922 can be affixed to handle body 3924. In another example, the coupler 3902 may be configured to slidably rotate about an axis of the end of handle body 3924 relative to end of the handle body 3924. For example, the coupler 3922 may be attached to the end of handle body 3924 using rotating swivel center mechanism 3928 (e.g., a collar that encircles the end of handle body 3924) that provides a pivot point about the axis of the end of the handle body 3924. In this example, the coupler 3922 may be implemented as a second coupler 302, as described above, that can releasably couple to coupler 3904 of the T-junction attachment 3900 (or other first exercised device 120) as shown in FIG. 39.

[0211] In some implementations, T-junction 4000 (as well as T-junction 3900) can be provided for cable machines, for example, where the cable is overhead, such as back workouts. The examples herein can enable attachment of one or more exercise devices to a single cable (e.g., an example of which is described below in connection with FIGS. 51A and 51B). This configuration can help to isolate muscles and / or enable attachments that utilize two hook-ups.

[0212] FIG. 41 illustrates an example exercise devices implemented as a weight plate lifter 4100, in accordance with an example of the present disclosure. In examples, the weight plate lifter 4100 may be implemented as a first exercise device 110 and / or a second exercise device 120 of FIGS. 1A-1L. For example, an instance of weight plate lifter 4100 may be used as a first exercise device 110 and releasably couple to a second exercise device 120 (e.g., weight plate 900), and another instance of weight plate lifter 4100 may be used as a second exercise device 120 and releasably couple to a first exercise device 110 (e.g., weight plate 900).

[0213] Weight plate lifter 4100 comprises a handle body 4108 disposed on a side of a plate body 4106. The handle body 4108 may include a grip region, such as a knurled portion of the handle body 4108 and / or rubberized surface for improved grip. The weight plate lifter 4100 also comprises a coupler 4104 disposed at a side of plate body 4106 opposite the handle body 4106. The weight plate lifter 4100 may include a shaft 4110 extending perpendicular or substantially perpendicular to the plate body 4106, for example, from a central region of plate body 4106. The coupler 4104 may be disposed at an end of the shaft 4110 opposite the plate body 4106. In the example of FIG. 41, weight plate lifter 4100 may include reinforcing structures 4112 at an intersection of the shaft 4110 and plate body 4106. The reinforcing structures 4112 may be provided as reinforcing ribs configured to reinforce the junction between the coupler 4104 and the plate body 4106, for example, by reinforcing the structural stiffness and rigidity therebetween. The coupler 4104 may be implemented, for example, as first coupler 208 and / or 210, as described above.

[0214] In an illustrative example of the multi-functional exercise system, in one or more instances of weight plates lifter 4100 can be releasably coupled to a weight plate 900, in accordance with an example. For example, weight plate 900, as described above, comprises a first coupler 910A implemented as first coupler 208 (or 210) and a second coupler 910B implemented as second coupler 302, as described above. Thus, in this example, coupler 4104 of weight plates lifter 4100A releasably couples to coupler 902B, while coupler 4102 of weight plates lifter 4100B releasably couples to coupler 902A.

[0215] FIG. 42 illustrates an example of dumbbell 4200, in accordance with an example of the present disclosure. The dumbbell 4200 may be substantially similar to dumbbell 200, except as provided herein. Accordingly, dumbbell 4200 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0216] The weights 204, 206 may also include couplers 4208, 4210 disposed on a respective weight 204, 206. In the example of FIG. 42, the couplers 4208, 4210 are provided as hook bars located in respective outer surfaces 212, 214. The hook bars my form a semi-circular structure having a hooked body, the diameter of the semi-circular structure may be larger a diameter of the shaft 202. However, the diameter of the semi-circular structure may be smaller than that of the shaft 202. In the example of FIG. 42, the hooked bars may comprise first and second end extending perpendicular, substantially perpendicular, or at an acute angle relative to an axis of the shaft 202 from a respective outer surface. The hooked body may connect one end to the other end.

[0217] The internal bars may be configured to releasably couple to other coupler as described above. For example, the other coupler may be implemented as a carabineer that can be releasably coupled to one or more of the hooked bars. In another example, the other coupler may be a band (e.g., band coupler and / or loose coupler described above), rope, or other elongated device that can be looped around one or more of the hooked bars, for example, by a knot or other method.

[0218] FIG. 43 illustrates an example of dumbbell, in accordance with an example of the present disclosure. The dumbbell may implemented as dumbbell 3200, except as provided herein. Accordingly, dumbbell 4200 includes shaft 202 and weights 204, 206 coupled to each end of the shaft 202.

[0219] The weights 204, 206 may be configured to releasably couple one or more hook attachments 4300 via couplers 4308 to a respective weight 204, 206 (two hook attachments 4300 are shown in FIG. 43). In the example of FIG. 43, weights 204, 206 include respective recesses (recess 3222 shown in FIG. 43 as an illustrative example, with an example of recess 3220 shown in FIG. 32), as described above in connection with FIG. 32, configured to receive and releasably connect to first couplers 4308, 4310. To this end, the weights 204, 206 may include first threaded couplers 3202, 3204 (threaded coupler 3202 shown in FIG. 32) in respective recesses 3220, 3222. For example, as shown in FIG. 43, weight 206 may comprise recess 3222 having a first threaded coupler 3204 formed in the outer surface. In the above examples, recess 3220, 3222 and respective first threaded couplers 3202, 3204 may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein.

[0220] The hook attachment 4300 may comprises couplers 4308 as part of coupler body 4302. Coupler body 4302 may include a shaft 4314, threaded coupler 4308 coaxially aligned with the shaft 4314, and a looped head (or eyelet) 4306, forming an eye screw like structure. The looped head 4306 may be provided as a fully or partial ring torus that is fully, substantially, or partially closed. The ring torus may have a center axis that is perpendicular or substantially perpendicular to the shaft 4314. The threaded coupler 4308 may be referred to as male threaded shafts, such as a threaded bolt that can be received by and interface with a threaded hole.

[0221] In examples, the threaded coupler 4308 may be configured to threadedly interface with one of threaded couplers 3202, 3204 to attach one or more hook attachments 4300 to a respective weight 204, 206 within a respective recess 3220, 3222. For example, as shown in FIG>43, recess 3222 of weight 206 may receive coupler body 4302 of a first hook attachment 4300 and threaded coupler 3204 may interface with threaded coupler 4308 of the first hook attachment 4300 to releasably connect the hook attachment 4300 to the weight 206. Likewise, recess 3220 of weight 204 may receive coupler body 4302 of a second hook attachment 4300 and threaded coupler 3202 may interface with threaded coupler 4308 of the second hook attachment 4300 to releasably connect the hook attachment 4300 to the weight 204. In some examples, the recesses 3220, 3222, and as such the hook attachments 4300, may be coaxial with the shaft 202, as shown in FIG. 43.

[0222] In another example, recess disposed along an axis that intersects the axis of the shaft (e.g., substantially perpendicular or otherwise orientated in a non-parallel orientation) may releasably couple one or more hook attachments 4300. For example, one or more recesses having first threaded couplers may be provided a side surface, such as side surface 216 and / or 218. As such, one or more hook attachments 4300 may be disposed on a side surface of weights 204, 206 via the recesses.

[0223] FIGS. 44A-44B illustrates an example exercise device implemented as a clevis coupler 4400, in accordance with an example of the present disclosure. In examples, the clevis coupler 4400 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1A-1L. For example, the clevis coupler 4400 may releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0224] In the example of FIGS. 44A-44B, the clevis coupler 4400 comprises a coupler body 4406 having a first end 4408 (also referred to as a first surface) and a second end (also referred to as a second surface) opposite the first end 4408. A coupler 4404 may be disposed on the first end 4408 extending from the first end 4408 in a direction opposite the coupler body 4406. The coupler 4404 may be disposed at a central region of the first end 4408. The coupler 4404 may be implemented, for example, as first coupler 208 and / or 210 described above. Accordingly, coupler 4404 may releasably couple to a second coupler 302 (or the like) described above, so to releasably couple the clevis coupler 4400 to a second exercise device.

[0225] A clevis fastener may be disposed on the second surface extending in a direction opposite the coupler body 4406. The clevis fastener may comprise two clevis members 4410, 4412 forming a U-shaped opening. While the clevis members 4410, 4412 are provided having a specific shape (e.g., rounded triangles), examples herein are not limited to this shape and the clevis members 4410, 4412 may have other shapes (e.g., semi-circular, semi-ovular, rounded rectangular, or any shape as desired). In an example, the clevis members 4410, 4412 may be provided as tongs having respective holes for receiving the clevis pin 4418. The clevis members 4410, 4412 may be parallel or substantially parallel to each other and may extend perpendicular or substantially perpendicular to the second surface. The clevis members 4410, 4412 each include a hole (hole 4414 is shown in FIGS. 44A-44B as an example) configured to receive a clevis pin 4418. In some examples, a split pin may be inserted in the clevis pin 4418 via a through hole in an orientation that intersects with an axis of the clevis pin 4418. The split pin may hold the clevis pin 4418 in place. In either case, the clevis pin 4418, when inserted in the holes of the clevis members 4410, 4412 may function to restrain a coupler or other attachment mechanism of exercise device within a space between the clevis members 4410, 4412.

[0226] In the illustrative example of configuration 4420 of the multi-functional exercise system is shown, in which the clevis coupler 4400 is releasably coupled to a straight bar attachment 4430, in accordance with an example. For example, as shown in FIG. 44B, straight bar attachment 4430, in this example, comprises a shaft 4434 having grips attachments 4436 (e.g., knurled portions and / or rubber attachments disposed thereon) provided, for example, on each end of shaft 4434. A hook coupler 4432 may be affixed between the grip attachments 4436, for example, at a central portion of the shaft 4434. The hook coupler 4432 may be similar to the couplers 4208, 4210 of FIG. 42 (e.g., the hooked bars). The shaft 4434, in some examples, may be configured to slidably rotate about its axis relative to the coupler 4432. For example, the coupler 4432 may be attached to the shaft 4434 using rotating swivel center mechanism 4438 (e.g., a collar that encircles the shaft 4434) that provides a pivot point about the axis of the shaft 4434. Accordingly, in the example of configuration 4420, the straight bar attachment 4430 can be releasably coupled to the clevis couple 4400, for example, by receiving the coupler 4432 within the space between the clevis members 4410, 4412 and restraining the coupler 4432 therein using the clevis pin 4418.

[0227] FIG. 45A-45B illustrates an example exercise device implemented as another clevis coupler 4500, in accordance with an example of the present disclosure. Clevis coupler 4500 may be substantively similar to clevis coupler 4400, except that clevis coupler 4500 comprises a coupler 4502 on the first end 4408. In this example, the couplers 4502 may be implemented as second coupler 302, described above.

[0228] FIGS. 46A-46B illustrates an example exercise device implemented as another clevis coupler 4600, in accordance with an example of the present disclosure. Clevis coupler 4600 may be substantively similar to clevis coupler 4400, except that clevis coupler 4600 comprises eyelet body 4610 extending from the first end 4408. Eyelet body 4610 may include a shaft 4614 and a looped head (or eyelet) 4616, forming an eye screw like structure, similar to hook attachment 4300 of FIG. 43. Shaft 4614 may extend from the first end 4408 in a direction opposite the coupler body 4406, for example, from a central region of the first end 4408. The shaft 4614 may be perpendicular or substantially perpendicular to the first end 4408.

[0229] In the illustrative example of configuration 4602 of the multi-functional exercise system is shown, in which the clevis coupler 4600 is releasably coupled to straight bar attachment 4430, in accordance with examples herein. For example, the straight bar attachment 4430 can be releasably coupled to the clevis couple 4600, for example, by receiving the coupler 4432 within the space between the clevis members 4410, 4412 and restraining the coupler 4432 therein using the clevis pin 4418.

[0230] Configuration 4602 also illustrates an example in which the clevis coupler 4600 is releasably coupled to dumbbell 4200 of FIG. 2. For example, a carabineer 4620 can be releasably coupled to coupler 4210 (or coupler 4208) of dumbbell 4200. The carabineer 4620 is also releasably coupled to the clevis coupler 4600 by inserting the carabineer 4620 into the loop head 4616 of the eyelet body 4610.

[0231] FIGS. 47A-47B illustrates an example exercise device implemented as another clevis coupler 4700, in accordance with an example of the present disclosure. Clevis coupler 4700 may be substantively similar to clevis coupler 4600, except that clevis coupler 4700 can be releasably coupled to a hook attachment 4300 of FIG. 43. For example, the first surface 4408 may include a first threaded coupler 4702 in a recess 4720 formed in the first surface 4408. In this example, recess 4720 and respective first threaded coupler 4702 may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also known as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein. Accordingly, the clevis coupler 4700 may be configured to releasable couple to hook attachment 4300, for example, by threadedly interfacing threaded coupler 4308 with threaded coupler 4702 to attach the hook attachment 4300 to the clevis coupler 4700. Configuration 4722 illustrates a multi-functional exercise system, in which the clevis coupler 4700 is releasably coupled to straight bar attachment 4430 and dumbbell 4200, in accordance with examples herein.

[0232] FIG. 48 illustrates an example exercise device implemented as another clevis coupler 4800, in accordance with an example of the present disclosure. Clevis coupler 4800 may be substantively similar to clevis coupler 4700, except that clevis coupler 4800 is shown releasably coupled to a coupler body 3224 having a first coupler 3208, as described in connection with FIG. 32. For example, recess 4720 and respective first threaded coupler 4702 may be configured to releasable couple to first coupler 3208, for example, by inserting shaft 3214 into recess 4720 and threadedly interfacing threaded coupler 3206 with threaded coupler 4702 to attach the coupler body 3224 to the clevis coupler 4800. Configuration 4820 illustrates a multi-functional exercise system, in which the clevis coupler 4800 is releasably coupled to straight bar attachment 4430 and coupler body 3224, in accordance with examples herein.

[0233] FIG. 49 illustrates an example exercise device implemented as another clevis coupler 4900, in accordance with an example of the present disclosure. Clevis coupler 4900 may be substantively similar to clevis coupler 4800, except that clevis coupler 4900 is shown releasably coupled to a coupler body 4901. The coupler body 4901 may be substantively similar to coupler body 3224, except that coupler body 4901 comprises coupler 4902, for example, implemented as a second coupler 302 as described above, in place of first coupler 3206. For example, recess 4720 and respective first threaded coupler 4702 may be configured to releasable couple to coupler 4902, for example, by inserting shaft 3214 into recess 4720 and threadedly interfacing threaded coupler 3206 with threaded coupler 4702 to attach the coupler body 4901 to the clevis coupler 4800. Configuration 4920 illustrates a multi-functional exercise system, in which the clevis coupler 4900 is releasably coupled to straight bar attachment 4430 and coupler body 4901, in accordance with examples herein.

[0234] FIG. 50 illustrates an example exercise device implemented as a weight plate 5000, in accordance with an example of the present disclosure. The weight plate 5000 may be substantially similar to weight plate 900 described above, except as provided herein.

[0235] In the example of 5000, the weight plate 5000 comprises a flat or substantially flat plate 902 having a first major face 912A, a second major face 912B, a central axis 904, and an outer rim 906 defining an equator surrounding the plate 902 about the central axis 904. The outer rim 906 comprises an outer surface 908, which maybe generally cylindrical. Additional examples can be found in above in connection with FIGS. 9A-9D.

[0236] In the example of FIG. 50, the weight plate 5000 also comprises one or more first couplers 5004 and one or more second couplers 5002 (one of each being shown in FIG. 50). The one or more first couplers 5004 may be disposed on the first major face 912A and the one or more second couplers 5002 may be disposed on the second major face 912B. The first and second couplers 5004, 5002 may be disposed at a central region of the respective major face 912A, 912B so to be coaxially aligned with the central axis 904 (not shown in FIG. 50). The first and second couplers 5004, 5002 may extend in a direction away from a respective major face 912A, 912B, as shown in FIG. 50. In examples, the one or more couplers 5004 may be substantially similar to first couplers 208, 210 described above and the one or more couplers 5002 may be substantially similar to second couplers 302 as described above.

[0237] In the example of FIG. 50, weight plate lifter 5000 may also include reinforcing structures 5014 at an intersection of the couplers 5004, 5002 and respective major faces 912A, 912B. The reinforcing structures 5014 may be provided as reinforcing ribs configured to reinforce the junction between a respective coupler and the respective major face of the plate 902, for example, by reinforcing the structural stiffness and rigidity therebetween.

[0238] FIG. 50 also illustrates an example configuration 5050 of a multi-functional exercise system, in which a plurality of weight plates 5000 are releasably coupled to a dumbbell 200, described above, to provide an adjustable weight system. In this example, weight plates 5000 are stacked one on each other forming a group of weight plates 5000. To this end, each weight plate 5000 is releasably coupled to another weight plate of a respective grouping, with an inner most weight plate 5000 releasably coupled to dumbbell 200. For example, first coupler 208 of dumbbell 200 can be releasably coupled to a second coupler 5004 of a first weight plate 5000, a first coupler 5002 of the first weight plate 5000 can be releasably coupled to a second coupler 5004 of a second weight plate 5000, a first coupler 5002 of the second weight plate 5000 can be releasable coupled to a second coupler 5004 of a third weight plate, and so on until the final weight plate 5000.

[0239] In some examples, dumbbell 200 may comprise a second coupler (e.g., an instance of coupler 302) in place of first coupler 208. In this case, weight plates 5000 can be flipped, such that the first coupler 5002 of the first weight plate 5000 can be releasably coupled to the second coupler of the dumbbell, the second coupler 5004 of a first weight plate 5000 can be releasably coupled to a first coupler 5002 of a second weight plate 5000, and so.

[0240] FIGS. 51A and 51B illustrate an example exercise device implemented as a workout station 5100, in accordance with an example of the present disclosure. In examples, the workout station 5100 may be substantially similar to workout station 2500 of FIG. 25, except as provided herein. The workout station 2500 may be, for example, a power rack or other weight training station. In the example of FIGS. 51A and 51B, the workout station comprises a cable machine in which frame 2501 houses one or more weight stacks 2503 releasably coupled to an exercise device via one or more cable and pulley systems.

[0241] More particularly, FIGS. 51A and 51B illustrate perspective views and side views of a cable and pulley systems 5100A, 5100B in a zoomed in view of region 5150. Cable and pulley systems 5100A, 5100B comprise a cable 5110 attached to a weight stack 2503 at one end and passing through one or more pulleys 5114 (one pulley is shown for illustrative purposes). FIG. 51A illustrates cable 5110 of cable and pulley systems 5100A having a coupler 5102 disposed at the other end 5112 of cable 5110, while FIG. 51B illustrates cable and pulley systems 5100B having a coupler 5104 disposed at the other end 5112. The coupler 5102 may be implemented as second coupler 302, while coupler 5104 may be implemented as a first coupler 208 (or 210). Accordingly, exercise devices having a first coupler 208, 210 can be releasably coupled to the cable 5110 via coupler 5102 or having a second coupler 302 can be releasably coupled to the cable 5110 via coupler 5104 for a variety of exercises.

[0242] While FIGS. 51A and 51B illustrate a single cable and pulley system at a certain position of the workout station 2500, examples herein are not limited to this example only. For example, one or more pulleys 5114 may be attached to one or more of the upright posts 2502A-D, one or more of the top cross-bars 2506A-F, one or more of the base cross-bars 2504A-B, or combinations thereof. For example, one or more ends of top cross-bars 2506A-F may comprise either of cable and pulley system 5100A, 5100B. In examples, alone or in combination with preceding examples, one or one or more upright posts 2502A-D may comprise either a portion of or a cable and pulley system 5100A, 5100B. As such, the example of workout station 2500 may comprise any number of pulley and cable systems between none to six in this particular example. The number of pulley and cable systems may be dependent on the particular configuration of the workout station 2500.

[0243] In some examples, the coupler 5104 can be attached to a cable of a pulley and cable system. For example, end 5112 can be slide into a receiving end of the coupler 5104. The receiving end may comprise a hole passing through a side wall. In some examples, the hole may be tapped into the side wall, but not completely through the receiving end thereby providing one hole. A screw, pin, or other restraining device can be inserted into the hole and pressed against end 5112. End 5112 of the cable 5110 can be pinched between the restraining device and a side wall of the coupler 5104 opposite the hole, thereby securing the end 5112 in place relative to the coupler 5104. Other methods of securing end 5112 to coupler 5104 may be utilized, such as adhesives, epoxies, or other glues that can cure and secure the end 5112 relative to coupler 5104. In another example, rivets, clamps, heat shrink tubing, and the like may be utilized to secure end 5112 relative to coupler 5104.

[0244] FIG. 52 illustrates an example exercise device implemented as hook coupler 5200, in accordance with an example of the present disclosure. In examples, the hook coupler 5200 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1A-1L. For example, the hook coupler 5200 may releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0245] In the example of FIG. 52, the hook coupler 5200 comprises a coupler body 5206 having a first end 5208 (also referred to as a first surface) and a second end 5210 (also referred to as a second surface) opposite the first end 5208. In the example of FIG. 52, the coupler body 5206 comprises a hexagonal cylinder shape; however, other cylindrical shapes may be utilized as desired. A coupler 5202 may be disposed on the first end 5208 extending from the first end 5208 in a direction opposite the coupler body 5206. The coupler 5204 may be disposed at a central region of the first end 5208. The coupler 5204 may be implemented, for example, as first coupler 208 and / or 210 described above. Accordingly, coupler 5204 may releasably couple to a second coupler 302 (or the like) described above, so to releasably couple the hook coupler 5200 to a second exercise device.

[0246] In examples, the hook coupler 5200 comprises an eyelet body 5212 extending from the second end 5210. Eyelet body 5212 may include a shaft 5214 and a looped or hooked head 5216, forming an eyelet like structure, similar to hook attachment 4300 of FIG. 43. Shaft 5214 may extend from the second end 5210 in a direction opposite the coupler body 5206, for example, from a central region of the second end 5210. The shaft 5214 may be perpendicular or substantially perpendicular to the second end 5210, for example, parallel or substantially parallel to a central axis passing through the coupler body 5206. In examples, the coupler 5204 and eyelet body 5212 may be coaxially aligned with the central axis of the coupler body 5206.

[0247] In some implementations, hook coupler 5200 can be provided for cable machines, for example, where the cable comprises a second coupler 302. The examples herein can enable attachment of one or more exercise devices to a single cable (e.g., an example of which is described below in connection with FIG. 51A), such that other exercise devices may be interfaced with the hooked head 5216.

[0248] FIG. 53 illustrates an example exercise device implemented as another hooked coupler 5300, in accordance with an example of the present disclosure. Hooked coupler 5300 may be substantively similar to hooked coupler 5200, except that hooked coupler 5300 comprises coupler 5202 extending from the first end 5208. In this example, the coupler 5202 may be implemented as second coupler 302, described above.

[0249] In some implementations, hook coupler 5300 can be provided for cable machines, for example, where the cable comprises a first coupler 208 and / or 210. The examples herein can enable attachment of one or more exercise devices to a single cable (e.g., an example of which is described below in connection with FIG. 51B), such that other exercise devices may be interfaced with the hooked head 5216.

[0250] FIG. 54 is a picture of an example exercise devices implemented as a hook coupler, in accordance with examples of the present disclosure. In examples, the hook coupler 5400 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1A-1L. For example, the hook coupler 5400 may be releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0251] FIG. 54 illustrates an example implementation of hook coupler 5400 comprising a first coupler 5402 provided as a male plug that is configured to be received in a female receptacle implemented as a second coupler included in another exercise device. That is, for example, coupler 5402 may be implemented, for example, as first coupler 208 and / or 210 described above. In the example of FIG. 54, the first coupler is provided as a male plug of a quick connect (or quick release) coupling interface. Accordingly, the hook coupler of FIG. 54 can be releasably coupled to the other exercise device.

[0252] In the example of FIG. 56, the hook coupler 5400 comprises a coupler body 5406 having a first end 5408 (also referred to as a first surface) and a second end 5410 (also referred to as a second surface) opposite the first end 5408. The coupler 5402 may be disposed on the first end 5408 extending from the first end 5408 in a direction opposite the coupler body 5406. The coupler 5402 may be disposed at a central region of the first end 5408.

[0253] The coupler body 5406 can be releasably coupled to a hook attachment 4300 of FIG. 43. For example, the second surface 5410 may include a threaded coupler in a recess formed in the first surface 5408, as described above, e.g., in connection with FIGS. 47A-47B. In this example, the recess and the threaded coupler may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded hole (also known as a tapped hole) having internal threads configured to interface with a counterpart thread inserted therein. Accordingly, the hooked coupler 5400 may be configured to releasable couple to hook attachment 4300, for example, by threadedly interfacing threaded coupler 4308 with the threaded coupler of the coupler body 5406 to attach the hook attachment 4300 to the hooked coupler 5400. While FIG. 54 illustrates a male plug as first coupler 5402, hooked coupler 5400 may alternatively comprise a female receptacle (e.g., as second couplers 308) configured to receive a male plug for releasably coupling thereto.

[0254] FIG. 55 illustrates example of configuration of the multi-functional exercise system in accordance with an example, in which second exercise device 120 is implemented as a clevis coupler 5500 releasably coupled to first exercise device 110 implemented as the hooked coupler 5400. The clevis coupler 5500 may be implemented as clevis coupler 4400 or clevis coupler 4800, except that clevis coupler 5500 comprises differently shaped clevis members 5510, 5512 forming a U-shaped opening. That is, opposed to rounder triangles shown in FIGS. 44 and 48, the clevis members 5510, 5512 comprise elongated planar shaft members extending from coupler body 5506 with eyelets 5514 on the end opposite second coupler 5504 configured to receive a clevis pin 5518. The second coupler 5504, in this example, is provided as a female receptacle that is configured to receive a male plug implemented as a first coupler 5402 of hooked coupler 5400, or another first coupler included in another exercise device. That is, for example, second coupler 5504 may be implemented, for example, as second coupler 308 described above.

[0255] In some examples, the first exercise device can be implemented as an adjustable dumbbell that is configured to selectively couple to and lift a user-selected subset of weight plates from a nested set of plates, for example, in a dial-select configuration in which a user rotates a dial adjustment to select a desired weight. For example, FIG. 56 illustrates an example of adjustable dumbbell 5600, in accordance with an example of the present disclosure. In this example, the adjustable dumbbell 5600 includes a shaft 5602 configured to be gripped by a user and a pair of end assemblies 5604, 5606 coupled to opposite ends of the shaft 5602. Each end assembly 5604, 5606 can include an out surface 5612, 5614 of a respective end assembly 5604, 5606. The end assemblies 5604, 5606 can be configured to interface with a plurality of removable weight plates 5605, 5603 that are selectively retained by the adjustable dumbbell 5600 when the adjustable dumbbell is lifted from a base or cradle (not shown).

[0256] In this example, the end assemblies 5604, 5606 include a respective dial end cap that is rotatable by a user to select a desired weight. In FIG. 56, dial end cap 5607 is shown as an example disposed on outer surface 5612 of end assembly 5604. It will be understood that end assembly 5606 comprises a similar end cap assembly disposed on outer surface 5614. The dial end caps can be located on the outer surface of a respective end assembly, opposite the shaft 5602, such that the dial end caps are accessible for user adjustment when the adjustable dumbbell is seated in the base. The dial end caps can be mechanically coupled to an internal selection mechanism including, for example, selector arms, selector pins, latches, or other engagement members that, in a selected setting, extend into corresponding features (such as recesses, slots, or windows) of a subset of weight plates based on the user selected weight so that the selected subset of weight plates are retained by the adjustable dumbbell during lifting while unselected plates remain supported by the base.

[0257] In the example of FIG. 56, first couplers 208, 210, as described above, can be formed in the dial end caps. For example, each dial end cap can include a recess formed in an outer surface of the dial end cap, and a respective first coupler can be disposed within the recess, e.g., as described in connection with FIGS. 2A-2B. FIG. 56 illustrates dial end cap 5604 comprising a recess 220 formed therein and coupler 208 disposed within the recess 220. It will be appreciated that end assembly 5606 likewise includes recess 222 formed in its dial end cap and coupler 210 disposed therein. The recess can be dimensioned such that an exposed face of the first couplers 208, 210 are flush or substantially flush with adjacent portions of the outer surface of the dial end cap when the first couplers are uncoupled to a second exercise device.

[0258] In some examples, the first couplers 208, 210 can be fixed to the dial end caps such that the first couplers 208, 210 rotate with the dial end cap during weight selection. In other examples, the first couplers 208, 210 may be rotatably decoupled from the dial end caps, for example, by a bearing, bushing, or swivel interface, such that the dial end caps can rotate relative to the first couplers 208, 210 and / or relative to a second exercise device coupled to the first coupler. For example, the dial end caps can include inner hubs supporting the weight selection mechanism and an outer ring defining the recesses 220, 222. In this example, the first couplers 208, 210 can be mounted to the outer rings via rotational interfaces that permits rotation of the dial end caps without transmitting substantial torque into a coupled second exercise device.

[0259] The first couplers 208, 210 can be positioned so as not to interfere with indicia on the dial end cap, such as weight markings, and not to impede a user's ability to grip and rotate the dial end caps. In some examples, the first couplers 208, 210 may be coaxial with an axis of the shaft 5602. In other examples, the first couplers 208, 210 may be positioned off-axis, for example, at a radial offset from the shaft axis, while still being disposed on the outer side of the end assembly.

[0260] FIG. 57 illustrates an example of adjustable dumbbell 5700, in accordance with an example of the present disclosure. Adjustable dumbbell 5700 may be substantively similar to adjustable dumbbell 5600, except that dials are disposed on a shaft-side of the end assemblies 5606, 5604. That is, opposed to dial end caps, adjustable dumbbell 5700 comprises dials 5707A and 5707B formed on the shaft 5602 such that the dials 5707A, 5707B are accessible for user adjustment when the adjustable dumbbell is seated in the base. Similar to the above, dials 5707A, 5707B can be mechanically coupled to an internal selection mechanism including, for example, selector arms, selector pins, latches, or other engagement members that, in a selected setting, extend into corresponding features (such as recesses, slots, or windows) of a subset of weight plates based on the user selected weight so that the selected subset of weight plates are retained by the adjustable dumbbell during lifting while unselected plates remain supported by the base.

[0261] In the example of FIG. 57, first couplers 208, 210, as described above, can be formed in the outer surfaces 5612, 5614 of the outer most weight plate of the receptive plurality of removable weight plates 5605, 5603. For example, outer most weight plate can include a recess formed in an outer surface of the weight plate, and a respective first coupler can be disposed within the recess, e.g., as described in connection with FIGS. 2A-2B. FIG. 57 illustrates outer surface 5712 comprising a recess 220 formed therein and coupler 208 disposed within the recess 220. It will be appreciated that end assembly 5606 likewise includes recess 222 formed in the outer surface of the outer most weight plate and coupler 210 disposed therein. The recess can be dimensioned such that an exposed face of the first couplers 208, 210 are flush or substantially flush with adjacent portions of the outer surface of the dial end cap when the first couplers are uncoupled to a second exercise device.

[0262] Examples of the present disclosure are described herein. It is to be understood, however, that the disclosed examples are merely examples and other examples can take various and alternative forms. The figures are not necessarily to scale; some features could be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative bases for teaching one skilled in the art to variously employ the examples. As those of ordinary skill in the art will understand, various features illustrated and described with reference to any one of the figures can be combined with features illustrated in one or more other figures to produce examples that are not explicitly illustrated or described. The combinations of features illustrated provide representative examples for typical application. Various combinations and modifications of the features consistent with the teachings of this disclosure, however, could be desired for particular applications or implementations.

[0263] As used herein, the term “substantially” means largely but not necessarily wholly the stated characteristic, property, or condition, and includes the recited characteristic, property, or condition with insubstantial variations that do not materially affect the relevant function. By way of example, the phrase “substantially flush” means that an exposed face or component is flush with, or nearly flush with, adjacent exterior surfaces or regions such that any offset is sufficiently small to avoid snagging, interference with handling, or impairment of use. In some implementations, “substantially flush” includes an exposed face that can be recessed relative or proud relative to adjacent exterior regions by a sufficiently small amount, within manufacturing tolerances.

[0264] As used herein, the term “or” may be construed in either an inclusive or exclusive sense. Moreover, the description of resources, operations, or structures in the singular shall not be read to exclude the plural. Conditional language, such as, among others, “can,”“could,”“might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain examples include, while other examples do not include, certain features, elements and / or steps.

[0265] “A”, “an”, and “the” as used herein refers to both singular and plural referents unless the context clearly dictates otherwise. By way of example, “an exercise device” configured to be used by a user for exercise refers to one exercise device, or more than one exercise device. The terms “including” and / or “having,” as used herein, are defined as comprising (i.e., open language). The phrase “at least one of. and. ” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. As an example, the phrase “at least one of A, B, and C” includes A only, B only, C only, or any combination thereof (e.g., AB, AC, BC, or ABC). Furthermore, the term “or”, as used herein, may be construed in either an inclusive or exclusive sense. Moreover, the description of resources, operations, or structures in the singular shall not be read to exclude the plural. Conditional language, such as, among others, “can,”“could,”“might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain examples include, while other examples do not include, certain features, elements and / or steps.

[0266] Terms and phrases used in this document, and variations thereof, unless otherwise expressly stated, should be construed as open ended as opposed to limiting. Adjectives such as “conventional,”“traditional,”“normal,”“standard,”“known,” and terms of similar meaning should not be construed as limiting the item described to a given time period or to an item available as of a given time, but instead should be read to encompass conventional, traditional, normal, or standard technologies that may be available or known now or at any time in the future. The presence of broadening words and phrases such as “one or more,”“at least,”“but not limited to” or other like phrases in some instances shall not be read to mean that the narrower case is intended or required in instances where such broadening phrases may be absent.

Examples

Embodiment Construction

[0054]Dumbbell devices for weightlifting exercises typically include a shaft that can be gripped by a user. Weights may be attached, either rigidly secured or fixed, onto each end of the shaft for resistance. A user generally lifts the weighted shaft for exercise training.

[0055]One drawback of conventional dumbbell systems is the limited exercises that may be performed using a single dumbbell. Due to conventional systems typically including a single shaft located between the weighs, a user typically performs lifting exercises by gripping the shaft and keeping it at a substantially level orientation. This limitation can be disadvantageous, for example, where a user would like to perform other types of exercises that may benefit from different shaft orientation and / or grip location variation. In this case, the user may be forced to obtain different devices that safely accommodate different grip locations.

[0056]In some situations, a user may attempt to use a conventional dumbbell in al...

Claims

1. An exercise system, comprising:a first exercise device configured for resistance training and comprising one or more first couplers disposed on one or more exterior surfaces of the first exercise device, the one or more first couplers being quick connect type couplers; anda second exercise device comprising a second coupler configured to be releasably coupled to a first coupler of the one or more first couplers.

2. The exercise system of claim 1, wherein the one or more first couplers are flush or substantially flush with the exterior surface.

3. The exercise system of claim 1, wherein the one or more first couplers comprise male plugs.

4. The exercise system of claim 3, wherein the second coupler comprises a female receptacle.

5. The exercise system of claim 1, wherein the second coupler is a quick connect, snap-fittable and releasably lockable device to the first coupler.

6. The exercise system of claim 1, wherein the one or more first couplers and the second coupler comprise threaded fittings.

7. The exercise system of claim 1, wherein the first exercise device is a dumbbell comprising a shaft and a weight coupled to each end of the shaft, and the weights comprise ones of the one or more first couplers on the exterior surface of a respective weight, wherein ones of the one or more first couplers are flush or substantially flush with the exterior surface.

8. The exercise system of claim 1, wherein the second exercise device comprises one of:a straight bar attachment;a rope attachment;a horizontal v-bar attachment;a vertical v-bar attachment;an abdominal wheel attachment;a curl bar attachment;a handle attachment;a kettlebell attachment;a weight collar attachment;a lateral bar attachment;a band, oranother dumbbell.

9. The exercise system of claim 1, wherein the first exercise device is a barbell, the barbell having a shaft that is straight or bent and comprises grips, a collar is located adjacent to each grip, and weighted sleeves that are located axially outward of the respective collars, wherein ones of the one or more first couplers are disposed in the weighted sleeves, respectively.

10. The exercise system of claim 1, wherein the first exercise device comprises a band having second couplers disposed on a first and second end.

11. The exercise system of claim 10, wherein the band is one of a resistance band, strength band, and rope.

12. The exercise system of claim 1, wherein the second exercise device is clevis coupler comprising a coupler body having a first end and a second end, wherein the second coupler is disposed on the first end and a clevis fastener is disposed on the second end, wherein the clevis fastener comprises one or more holes configured to receive a clevis pin and releasably couple the first exercise device to the clevis fastener.

13. The exercise system of claim 12, wherein the first exercise device is a hooked coupler comprising a coupler body having a first coupler of the one or more couplers extending from the coupler body and an eyelet body extending from the coupler body in a direction opposite the first coupler.

14. The exercise system of claim 1, wherein the first exercise device is a medicine ball.

15. The exercise system of claim 14, wherein the one or more first couplers are symmetrically arrayed about the weighted medicine ball.

16. An exercise system, comprising:a dumbbell comprising a shaft and a weight coupled to each end of the shaft, each weight having an outer surface with a recess formed therein and a first coupler disposed within the recess such that an end of the first coupler is flush or substantially flush with adjacent portions of the outer surface when the first coupler is uncoupled; andan exercise device comprising and a second coupler, the second coupler configured to releasably couple to either of the first couplers in a load-bearing manner and to support the dumbbell by the exercise device in a plurality of orientations while permitting the dumbbell to be used as a stand-alone dumbbell when the first couplers are uncoupled.

17. The exercise system of claim 16, wherein the one or more first couplers comprise male plugs and the second coupler comprises a female receptacle.

18. The exercise system of claim 17, wherein the first couplers comprise a coupler body having a male threaded fitting opposite the male plug, wherein the weights comprise female threaded fittings configured to receive the male threaded fitting.

19. The exercise system of claim 16, wherein the first and second couplers are quick connect, snap-fittable and releasably lockable devices.

20. The exercise system of claim 16, wherein the second exercise device comprises one of:a straight bar attachment;a rope attachment;a horizontal v-bar attachment;a vertical v-bar attachment;an abdominal wheel attachment;a curl bar attachment;a handle attachment;a kettlebell attachment;a weight collar attachment;a lateral bar attachment;a band, oranother dumbbell.

Images