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

PATENT APPLICATION Docket No.103191-00105AUGMENTED WEIGHT LIFTING SYSTEMCross 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 February 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 June 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 multifunctional exercise system, in accordance with examples of the present disclosure.PATENT APPLICATION Docket No.103191-00105

[0006] FIGS. 2A-2B illustrate an example of a first exercise device that can be utilized in the multi-functional exercise system of FIGS. 1 A-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. 3 A-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 weight belt, in accordance with an example of the present disclosure.

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

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

[0014] FIGS. 9A and 9B illustrates an example of dumbbell, in accordance with an example of the present disclosure.

[0015] FIGS. 10A-10B and 11A-11B illustrate examples exercise devices implemented as band couplers, in accordance with examples of the present disclosure.

[0016] FIGS. 12 and 13 illustrate example dumbbells, in accordance with examples of the present disclosure.

[0017] FIGS. 14A-19 illustrate example exercise devices implemented as clevis couplers, in accordance with examples of the present disclosure.

[0018] FIGS. 20 and 21 illustrate example exercise devices implemented as hook couplers, in accordance with examples of the present disclosure.

[0019] FIG. 22 is a picture of an example exercise devices implemented as a hook coupler, in accordance with examples of the present disclosure.PATENT APPLICATION Docket No.103191-00105

[0020] FIG. 23 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.

[0021] FIGS. 24 and 25 illustrate examples of adjustable dumbbells, in accordance with an example of the present disclosure.

[0022] The figures are not exhaustive and do not limit the present disclosure to the precise form disclosed.Detailed Description

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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 secondPATENT APPLICATION Docket No.103191-00105exercise 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.

[0027] FIGS. 1A-1L illustrates examples of various configurations of a multifunctional exercise system, in accordance with examples of the present disclosure. FIGS. 1 A-1L depicts configurations 100A-100L of the multi-functional exercise system used by a user U for resistance exercises. In the examples of FIGS. 1 A-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.

[0028] 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).

[0029] 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.

[0030] 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.PATENT APPLICATION Docket No.103191-00105

[0031] 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. 1 A).

[0032] 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 1 / 4-inch NPT (National Pipe Thread) fitting.

[0033] 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, 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).

[0034] 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 234PATENT APPLICATION Docket No.103191-00105can 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.

[0035] 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.

[0036] 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 isPATENT APPLICATION Docket No.103191-00105shown 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.

[0037] 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.

[0038] 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.

[0039] 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 exercisePATENT APPLICATION Docket No.103191-00105implement. 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. 24 illustrates a female receptacle having a male threaded fitting as mounting portion 248.

[0040] 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.

[0041] 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 loadbearing 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.

[0042] 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.PATENT APPLICATION Docket No.103191-00105

[0043] 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.

[0044] 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).

[0045] 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 1 / 4-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.

[0046] 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.PATENT APPLICATION Docket No.103191-00105

[0047] 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.

[0048] 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 304 A. In some examples, the shaft 304 A may be configured to slidably rotate about its axis relative to the second coupler 302A. For example, the second coupler 302 A may be attached to the shaft 304 A 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 304 A.

[0049] Referring to FIG. IK, 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 300 A, while the dumbbell 200 hangs in a vertical orientation via releasably coupling of one of first couplers 208,210 and second couplers 302 A. The user U may be able to perform bicep curls, deadlifts, or any resistance exercise desired.

[0050] 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 somePATENT APPLICATION Docket No.103191-00105examples, 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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 toPATENT APPLICATION Docket No.103191-00105a 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.

[0055] Referring to FIG. IL, 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 weightbearing 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.

[0056] 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 302 A 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 302 A from one end to the other end of rope 304E).

[0057] Referring to FIG. IF, 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 ofPATENT APPLICATION Docket No.103191-00105one 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. IF.

[0058] 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 304 A. 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.

[0059] Referring to FIG. ID, 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 3 OOF, 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.

[0060] 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 endPATENT APPLICATION Docket No.103191-00105of 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.

[0061] 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.

[0062] 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.

[0063] Referring to FIG. 1 J, an illustrative example of configuration 100 J of the multifunctional 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, 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. 1 J.PATENT APPLICATION Docket No.103191-00105

[0064] FIG. 31 illustrates a second exercise device 120 implemented as a horizontal v-bar attachment 3001. Horizontal v-bar attachment 3001 comprises a pair of v-plates 3041 parallel or substantially parallel to each other and attached via a pair of grip rods 3061 and a base rod 3101. A second coupler 3021 is disposed on a central portion of the base rod 3101 extending perpendicular or substantially perpendicular to an axis of the base rod 3101. In some examples, the grip rods 3061 can comprise knurled portions and / or rubber attachments disposed thereon for gripping. In some examples, the second coupler 3021 may be fixedly attached to the base rod 3101. In another example, second coupler 3021 may be configured to slidably rotate about the central portion of the base rod 3101. For example, the second coupler 3021 may be attached to the base rod 3101 using rotating swivel center mechanism 3081 (e.g., a collar that encircles the central portion of base rod 3101) that provides a pivot point about the axis of the base rod 3101.

[0065] 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 3001 releasably coupled to the first exercise device 110 implemented as the dumbbell 200. In this example, user U can grip the grip rods 3061 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 3021. The user U may be able to perform various resistance exercises, as shown in FIG. 1H.

[0066] FIG. 3J illustrates a second exercise device 120 implemented as a vertical v-bar attachment 3001. Vertical v-bar attachment 3001 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 302 J may be fixedly attached to the v-shaped shaft 304 J. In another example, second coupler 3021 may be configured to slidably rotate about the v-shaped shaft 304 J. For example, the second coupler 302 J may be attached to the v-shaped shaft 304 J 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 304 J. The vertical v-shaped attachment 300 J may also include end caps 310J.PATENT APPLICATION Docket No.103191-00105

[0067] Referring to FIG. II, an illustrative example of configuration 1001 of the multifunctional exercise system is shown, in which second exercise device 120 is implemented as a vertical v-bar attachment 3001 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 302 J. The user U may be able to perform various resistance exercises, as shown in FIG. II.

[0068] 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.

[0069] Referring to FIG. IB, 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. IB, which the user U can use to perform various exercises as desired.

[0070] 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.

[0071] 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 radialPATENT APPLICATION Docket No.103191-00105direction). 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.

[0072] 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.

[0073] 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. 1 A-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.

[0074] 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-2B, the couplers 510a, 510B may be located in respective recesses 512A, 512B.PATENT APPLICATION Docket No.103191-00105

[0075] FIG. 6 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.

[0076] In the example of FIG. 6, 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. 6. 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. The chain 1004 may be provided having a length as desired for a given application.

[0077] FIG. 7 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.

[0078] In the example of FIG. 7, 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. 7, the first end 2006 may be connected to a first end of a chain 2008. The chain 2008 can comprise a coupler 2010 on a second 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.

[0079] In some examples, chain 2008 may also comprise a second coupler disposed at the first end of the chain 2108 for releasably coupling the chain 2008 to the body 2002. For example, the body 2002 may comprise a coupler (e.g., one of one of first couplers 208, 210 orPATENT APPLICATION Docket No.103191-00105second coupler 302) may be provided at an upper end (e.g., mounting end) of the body 2002 and a counterpart coupler (e.g., second coupler 302 or one of first couplers 208, 210) may be provided at the first end of the chain 2008.

[0080] In some examples, the chain 2008 may have a carabineer disposed on either end. For example, a carabineer may be affixed to or otherwise formed into an end of the chain 2008 for releasably interlocking with a mounting bracket affixed to the upper end of body 2002 and / or a mounting bracket installed on a surface on which the punching bag 2000 is to be hung.

[0081] FIG. 8 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. 8, dumbbell holder 2900 is shown holding a weight of a dumbbell D.

[0082] In the example of FIG. 8, 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.

[0083] 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.

[0084] In some examples, a looped handle may be provided on an axial end opposite the support ring 2914 instead of coupler 2902. The looped handle may connect to ends of one of base plates 2906 or 2908. For example, looped handle may comprise one end connected at a first end of base plate 2908 and another end connected to a second end of base plate 2908. The looped handle may be configured to be gripped by a user. In some examples, the loopedPATENT APPLICATION Docket No.103191-00105handle may include a grip, such as a knurled surface and / or rubber atachments disposed thereon.

[0085] FIG. 9 A 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.

[0086] 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. 9 A, 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. 9A 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. 9A, 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.

[0087] 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. 9B. 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.

[0088] FIGS. 10A-10B 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.

[0089] In the example of FIGS. 10A-10B, 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 loopedPATENT APPLICATION Docket No.103191-00105band (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. 10A-10B, 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.10A, the one or more couplers 3704 may be implemented as second couplers 302 as described above.

[0090] Furthermore, FIG. 10B 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. 10B), 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. 10B, two band couplers 3700 are shown coupled to two dumbbells 200.

[0091] FIGS. 11 A-l IB 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.

[0092] FIG. 12 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.PATENT APPLICATION Docket No.103191-00105

[0093] The weights 204, 206 may also include couplers 4208, 4210 disposed on a respective weight 204, 206. In the example of FIG. 12, the couplers 4208, 4210 are provided as hook bars located in respective outer surfaces 212, 214. The hook bars may form a semicircular structure having a hooked body, the diameter of the semi-circular structure may be larger than the 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. 12, 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.

[0094] 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.

[0095] FIG. 13 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.

[0096] 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. 13). In the example of FIG. 13, weights 204, 206 include respective recesses (recess 3222 shown in FIG. 13 as an illustrative example of the respective recesses) configured to receive and releasably connect to first couplers 4308, 4310. To this end, the weights 204, 206 may include first threaded couplers in respective recesses . For example, as shown in FIG. 13, weight 206 may comprise recess 3222 having a first threaded coupler 3204 formed in the outer surface. In the above examples, the recess (e.g., recess 3220 and recess formed in weight 204) and respective first threaded couplers (e.g., first threaded coupler 3204 and the other threaded coupler in weight 204) may be referred to as a female threaded receptacle. An example of a female threaded receptacle may be a threaded holes (also knownPATENT APPLICATION Docket No.103191-00105as tapped holes) having internal threads configured to interface with a counterpart thread inserted therein.

[0097] 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.

[0098] In examples, the threaded coupler 4308 may be configured to threadedly interface with one of threaded coupler 3204 and the threaded coupler provided on weight 204 to attach one or more hook attachments 4300 to a respective weight 204, 206 within a respective recess (e.g., recess 3222). For example, 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 of weight 204 may receive coupler body 4302 of a second hook attachment 4300 and the respective threaded coupler 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, and as such the hook attachments 4300, may be coaxial with the shaft 202, as shown in FIG. 13.

[0099] 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.

[0100] FIGS. 14A-14B 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 exercisePATENT APPLICATION Docket No.103191-00105device of FIGS. 1 A-1L. For example, the clevis coupler 4400 may releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0101] In the example of FIGS. 14A-14B, 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.

[0102] 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, semiovular, 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. 14A-14B 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.

[0103] 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. 14B, 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, forPATENT APPLICATION Docket No.103191-00105example, 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 provided as a hook bar located on a surface of rotating swivel center mechanism 4438. 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 clevis pin 4418. In the example of FIG.14B, 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 4434 from a respective outer surface. 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 coupler 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.

[0104] FIGS. 15A-15B 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.

[0105] FIGS. 16A-16B 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. The eyelet body 4610 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 4614. 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.

[0106] 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 barPATENT APPLICATION Docket No.103191-00105attachment 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.

[0107] Configuration 4602 also illustrates an example in which the clevis coupler 4600 is releasably coupled to dumbbell 4200 of FIG. 12. 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.

[0108] FIGS. 17A-17B 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, e.g., as described in connection with FIG.13. 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 multifunctional exercise system, in which the clevis coupler 4700 is releasably coupled to straight bar attachment 4430 and dumbbell 4200, in accordance with examples herein.

[0109] The hook attachment 4300, in this example, 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, substantively similar to looped head (or eyelet) 4616 described above. 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.PATENT APPLICATION Docket No.103191-00105

[0110] In examples, the threaded coupler 4308 may be configured to threadedly interface with threaded coupler 4702 to attach the hook attachment 4300 to the coupler body 4406. For example, recess 4720 may receive the hook attachment 4300 and threaded coupler 4702 may interface with threaded coupler 4308 to releasably connect the hook attachment 4300 to the clevis coupler 4700.

[0111] FIG. 18 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. 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.

[0112] FIG. 19 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.

[0113] FIG. 20 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.

[0114] In the example of FIG. 20, 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. 20, thePATENT APPLICATION Docket No.103191-00105coupler 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.

[0115] 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 as described in connection with FIGS. 17A-17B. 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.

[0116] 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, such that other exercise devices may be interfaced with the hooked head 5216.

[0117] FIG. 21 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.

[0118] 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, such that other exercise devices may be interfaced with the hooked head 5216.

[0119] FIG. 22 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 couplerPATENT APPLICATION Docket No.103191-001055400 may be implemented as the second exercise device 120 and / or first exercise device of FIGS. 1 A-1L. For example, the hook coupler 5400 may be releasably coupled to a first exercise device 110 and / or a second exercise device 120.

[0120] FIG. 22 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. 22, the first coupler is provided as a male plug of a quick connect (or quick release) coupling interface. Accordingly, the hook coupler of FIG.22 can be releasably coupled to the other exercise device.

[0121] In the example of FIG. 24, 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.

[0122] The coupler body 5406 can be releasably coupled to a hook attachment 4300 as described in connection with FIGS. 17A-17B. 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. 17A-17B. 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. 22 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.

[0123] FIG. 23 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 orPATENT APPLICATION Docket No.103191-00105clevis coupler 4800, except that clevis coupler 500 comprises differently shaped clevis members 5510, 5512 forming a U-shaped opening. That is, opposed to rounder triangles shown in FIGS. 14 and 18, 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.

[0124] 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. 24 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).

[0125] 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. 24, 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 soPATENT APPLICATION Docket No.103191-00105that the selected subset of weight plates are retained by the adjustable dumbbell during lifting while unselected plates remain supported by the base.

[0126] In the example of FIG. 24, 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. 24 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.

[0127] 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.

[0128] 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.

[0129] FIG. 25 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 endPATENT APPLICATION Docket No.103191-00105assemblies 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.

[0130] In the example of FIG. 25, 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. 25 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.

[0131] Examples herein are not limited to the above example exercises devices. For example, the first and / or second exercise device may be implemented as any exercise device modified to include one or more first and / or second couplers. For example, the first and / or second exercise device may be implemented as curl bars having couplers, as disclosed herein, integrated at ends of weight sleeves; barbell / curl bar end caps to couple to couplers formed in the weight sleeves; barbell extenders; weight plates having couplers, as disclosed herein, integrated onto one or more sides of major surfaces and / or about an outer rim surface; weight clamps; cable attachments for attaching to cables via couplers as disclosed herein; cable carabineer attachments having a carabiner on one end and a coupler (e.g., a first or second coupler as disclosed herein) at the other end; kettle bells having couplers, as disclosed herein, integrated into and distributed about the weighted bell and / or handle; loose couplers havingPATENT APPLICATION Docket No.103191-00105one or more couplers (e.g., first or second couplers) at one or more ends of the loose band; weight sleds having one or more couplers distributed at various points of the weight sled; weight or pylo box having couplers, as disclosed herein, integrated into one or more surfaces of the box; workout station of pully systems and / or racks having couplers, as disclosed herein, for attaching components to pully systems (e.g., cables having counterpart couplers thereon); band holders having couplers, as disclosed herein, integrated into a ball joint; and weight plate lifters for releasably coupling one or more weight plate lifters to weight plates for lifting and manipulating the weight plates.

[0132] 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.

[0133] 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.

[0134] 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 thePATENT APPLICATION Docket No.103191-00105singular 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.

[0135] “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.

[0136] 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.

Claims

PATENT APPLICATION Docket No.103191-00105ClaimsWhat is claimed is:

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;PATENT APPLICATION Docket No.103191-00105a 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. 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.PATENT APPLICATION Docket No.103191-0010515. The exercise system of claim 16, wherein the one or more first couplers comprise male plugs and the second coupler comprises a female receptacle.

16. 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.

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

18. 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.

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