Variable resistance exercise device

Abstract

A variable resistance exercise device is provided, comprising a pair of armbands and a handle tube having a longitudinal internal bore. The tube has first and second ends and includes a solid metal central shaft fitted through the internal bore, such that respective first and second end portions of the shaft are exposed at their respective first and second ends of the tube. The first and second armbands of the pair are respectively fitted to the first and second ends of the shaft. In some cases, the device is part of a kit comprising a base having a bottom surface containing a groove, and one or more elastic bands, each configured to removably connect the base to the exercise bar by fitting the base into the groove of the base and passing it through the first and second armbands.

Description

[0001] This application is a divisional application of application number 202080009182.2, filed on February 18, 2020, entitled "Variable Resistance Exercise Device".

[0002] Cross-references to related applications

[0003] This application claims priority to U.S. Patent Application No. 16 / 283,419, filed February 22, 2019, entitled “Variable Resistance Exercise Device,” which is incorporated herein by reference. Technical Field

[0004] This disclosure generally relates to exercise equipment. More specifically, this disclosure pertains to an improved handle for exercise equipment. Background Technology

[0005] Variable resistance devices have been identified as advantageous over conventional devices because they provide variable but sustained resistance throughout the range of motion, while conventional devices (such as free weights) provide constant resistance. Constant resistance devices have the disadvantage that they force the user to apply the same amount of resistance at the beginning of the range of motion (e.g., a short application distance) before favorable biomechanics emerge and at the end of the range of motion (where the user enjoys better biomechanics and can apply more force). Thus, in the case of conventional weights, it is common for the user to not be able to train muscles with sufficient resistance throughout the entire range of motion because they cannot exceed their weakest initial range of motion. Variable resistance devices address this problem by providing low resistance at the beginning of the range of motion and higher resistance at the end.

[0006] However, existing variable resistance exercise devices have their drawbacks. While they offer a significant amount of resistance at the end of the range of motion, which is advantageous, this high resistance requires the device to be very stable and well-designed to provide the stability needed by exercisers who are fully focused on the large resistance encountered at the far end of the range of motion during exercises using such devices. Many designs for variable resistance devices have been manufactured and marketed over the years. However, advancements in the design of such devices are needed to increase their usability, the breadth of exercises they can be used for, and the maximum amount of resistance they can safely withstand.

[0007] Given the above disclosure, what is needed in the art is an improved variable resistance exercise device. Summary of the Invention

[0008] This disclosure addresses the shortcomings of the above-described variable resistance exercise apparatus by providing an improved variable resistance exercise apparatus. The improved variable resistance exercise apparatus is more stable than the prior art variable resistance exercise apparatus described above, while providing the same advantages over conventional constant resistance exercise apparatus (such as free weights).

[0009] According to some embodiments, an exercise bar with an improved handle is provided. The exercise bar includes a handle tube having a longitudinal internal bore. The handle tube also includes a first end and a second end. Further, the handle tube includes a solid metal central shaft fitted through the longitudinal internal bore. This fitting of the solid metal central shaft through the longitudinal internal bore exposes a first end portion of the solid metal central shaft at the first end of the handle tube. This fitting of the metal central shaft through the longitudinal internal bore also exposes a second end portion of the solid metal central shaft at the second end of the handle tube. A first belt arm is fitted to the first end of the solid metal central shaft, and a second belt arm is fitted to the second end of the solid metal central shaft.

[0010] In some embodiments, the exercise bar includes a first cylindrical handle end cap having a first end face, a second end face, and a cylindrical outer surface. The first cylindrical handle end cap also includes a first drilled hole disposed between the first and second faces of the first cylindrical handle end cap along its central axis. The exercise bar also includes a second cylindrical handle end cap having a first end face, a second end face, and a cylindrical outer surface. The second cylindrical handle end cap also includes a first drilled hole between its first and second faces along its central axis. Therefore, a first end portion of the solid metal central shaft is fitted through the first drilled hole in the first cylindrical handle end cap, and a second end portion of the solid metal central shaft is fitted through the first drilled hole in the second cylindrical handle end cap. Furthermore, the first belt arm is attached to the first end of the solid metal central shaft by attaching it to the first cylindrical handle end cap, and the second belt arm is attached to the second end of the solid metal central shaft by attaching it to the first cylindrical handle end cap.

[0011] In some embodiments, the exercise bar includes a first handle bearing and a second handle bearing. Each of the first and second handle bearings includes a corresponding hollow cylindrical member having an inner circumferential surface and an outer circumferential surface. A first end portion of a solid metal central shaft is fitted through the first handle bearing, wherein the outer circumferential surface of the solid metal shaft contacts the inner circumferential surface of the first handle bearing. A second end portion of the solid metal central shaft is fitted through the second handle bearing, wherein the outer circumferential surface of the solid metal shaft contacts the inner circumferential surface of the second handle bearing. Additionally, a longitudinal internal bore in the handle tube encloses and frictionally contacts the outer circumferential surfaces of both the first and second handle bearings.

[0012] In some embodiments, the exercise bar includes a first outer washer fitted onto a first end portion of a solid metal shaft. The exercise bar also includes a second outer washer fitted onto a second end portion of the solid metal shaft. Thus, a first face of the first outer washer abuts against an end face of a first hollow metal cylinder, and a second face of the first outer washer opposite to the first face abuts against a first face of a first cylindrical handle end cap. Similarly, a first face of the second outer washer abuts against an end face of a second hollow metal cylinder, and a second face of the second outer washer opposite to the first face abuts against a first face of a second cylindrical handle end cap.

[0013] In some embodiments, the first cylindrical handle end cap has a second drilled hole orthogonal to the first drilled hole of the first cylindrical handle end cap, wherein the second drilled hole of the first cylindrical handle end cap extends between the cylindrical outer surface of the first cylindrical handle end cap and the central axis of the first cylindrical handle end cap. Similarly, the second cylindrical handle end cap has a second drilled hole orthogonal to the first drilled hole. The second drilled hole of the second cylindrical handle end cap extends between the cylindrical outer surface of the second cylindrical handle end cap and the central axis of the second cylindrical handle end cap. A first strap arm is attached to the first cylindrical handle end cap by slotting a first end of the first armband through the second drilled hole of the first cylindrical handle end cap. Similarly, a second strap arm is attached to the second cylindrical handle end cap by slotting a first end of the second armband through the second drilled hole of the second cylindrical handle end cap. In some such embodiments, a first end portion of the solid metal central shaft includes a first notch for receiving a first end of the first armband. Similarly, a second end portion of the solid metal central shaft includes a second notch for receiving a first end of the second armband.

[0014] In some embodiments, the exercise bar includes a first locking pin and a second locking pin. In some such embodiments, a first cylindrical handle end cap includes a third drilled hole that extends between a first face and a second face of the first handle end cap, parallel to the first drilled hole and through a second drilled hole in the first handle end cap. Similarly, a second cylindrical handle end cap includes a third drilled hole that extends between a first face and a second face of the second handle end cap, parallel to the first drilled hole and through a second drilled hole in the second handle end cap. Furthermore, a first end of a first armband includes a drilled hole, and a first end of a second armband includes a drilled hole. Therefore, the first locking pin locks the first end of the first armband to the first cylindrical handle end cap by inserting into both the third drilled hole through the first cylindrical handle end cap and the drilled hole in the first armband. Similarly, the second locking pin locks the first end of the second armband to the second cylindrical handle end cap by inserting into both the third drilled hole through the second cylindrical handle end cap and the drilled hole in the second armband.

[0015] In some embodiments, the handle tube comprises a metallic material. Further, the handle tube includes a first circumferential gripping area and a second circumferential gripping area.

[0016] In some embodiments, the first arm comprises a metallic material. Further, the first arm includes a hook region for receiving a first portion of the elastic band, and the second arm comprises a metallic material and also includes a hook region for receiving a second portion of the elastic band.

[0017] In some embodiments, the solid metal central shaft is made of steel.

[0018] In some embodiments, this disclosure provides an exercise bar including an improved handle. The exercise bar includes a handle tube having a drilled hole through its longitudinal axis and a first end portion and a second end portion. Further, the handle tube includes a central shaft fitted through the drilled hole. This fitting of the central shaft exposes the first and second end portions of the central shaft at their respective end portions of the handle tube. A first strap arm is fitted to the first end portion of the central shaft, and a second strap arm is fitted to the second end portion of the central shaft.

[0019] In some embodiments, this disclosure provides an exercise kit. The exercise kit includes an exercise bar as described herein. The exercise kit also includes a base. Further, the exercise kit includes one or more elastic bands. Thus, the elastic bands in the one or more elastic bands removably attach the base to the exercise bar.

[0020] In some embodiments, the exercise kit includes at least three elastic bands with different resistances to deformation. Attached Figure Description

[0021] To better understand the disclosed embodiments, reference should be made to the following description of the embodiments in conjunction with the accompanying drawings, wherein the same reference numerals refer to corresponding parts throughout the drawings.

[0022] The embodiments disclosed herein are illustrated by way of example rather than limitation in the accompanying drawings. Throughout the drawings, the same reference numerals denote corresponding parts.

[0023] Figure 1 An exemplary exercise bar according to an embodiment of the present disclosure is shown;

[0024] Figure 2 An exploded view of an exemplary exercise bar according to an embodiment of the present disclosure is shown;

[0025] Figure 3 A cross-sectional view of an exemplary exercise bar according to an embodiment of the present disclosure is shown;

[0026] Figure 4 and Figure 5An exemplary locking mechanism for the end portion of an exercise bar according to an embodiment of the present disclosure is shown; and

[0027] Figure 6 and Figure 7 An end user is shown utilizing an exemplary exercise bar in a first position and a second position, respectively, according to an embodiment of this disclosure. Detailed Implementation

[0028] Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. Numerous specific details are set forth in the following detailed description in order to provide a thorough understanding of this disclosure. However, it will be apparent to those skilled in the art that this disclosure can be practiced without these specific details. In other instances, well-known methods, procedures, components, circuits, and networks have not been described in detail so as not to unnecessarily obscure aspects of the embodiments.

[0029] Multiple instances may be provided for a component, operation, or structure described herein as a single instance. Finally, the boundaries between various components, operations, and data storage devices are arbitrary to some extent, and specific operations are shown in the context of a particular illustrative configuration. Other forms of functionality are foreseeable and may fall within the scope of the multiple implementations. Generally, structures and functions presented as separate components in the example configurations can be implemented as combined structures or components. Similarly, structures and functions presented as single components can be implemented as separate components. These and other variations, modifications, additions, and improvements fall within the scope of the multiple implementations.

[0030] It should also be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first handle may be referred to as a second handle, and similarly, a second handle may be referred to as a first handle, without departing from the scope of this disclosure. Both the first handle and the second handle are handles, but they are not the same handle. Furthermore, the terms "exerciser," "end-user," and "user" are interchangeable.

[0031] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the appended claims, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or,” as used herein, refers to and covers any and all possible combinations of one or more of the associated listed items. It will be further understood that, when used in this specification, the terms “comprises” and / or “comprising” specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0032] As used herein, the term "if" can be interpreted as meaning "when" or "in" or "in response to determination" or "according to determination" or "in response to detection" is true, depending on the context. Similarly, the phrases "if determination (the stated prerequisite is true)" or "if (the stated prerequisite is true)" or "when (the stated prerequisite is true)" can be interpreted as meaning "in determination" or "in response to determination" or "according to determination" or "in response to detection" is true, depending on the context.

[0033] For illustrative purposes, numerous specific details have been set forth in order to provide an understanding of various embodiments of the inventive subject matter. However, it will be apparent to those skilled in the art that the subject matter of the invention can be practiced without these specific details. Generally, well-known structures and techniques are not shown in detail.

[0034] For purposes of explanation, the foregoing description has been illustrated with reference to specific embodiments. However, the following illustrative discussion is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed. Many modifications and variations are possible in light of the foregoing teachings. These embodiments were chosen and described in order to best explain the principles and their practical application, thereby enabling others skilled in the art to best utilize these embodiments and various embodiments with various modifications suited to the specific intended use.

[0035] For clarity, not all conventional features of the embodiments described herein are shown and described. It should be understood that in the development of any such actual embodiment, many implementation-specific decisions are made to achieve the designer's specific goals, such as conforming to use case and business-related constraints, and these specific goals will vary between one implementation and another, and between one designer and another. Moreover, it should be understood that such design work can be complex and time-consuming, but nevertheless remains a routine engineering task for those skilled in the art who benefit from this disclosure.

[0036] For ease of interpretation and precise definition in the appended claims, the terms “upper,” “lower,” “up,” “lower,” “upward,” “downward,” “lateral,” “longitudinal,” “inner,” “outer,” “inner side,” “outer side,” “inward,” “outer side,” “inward,” “outer,” “front,” “rear,” “back,” “forward,” and “backward” are used to describe features of exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0037] Generally speaking, the exercise bar disclosed herein enables the end user to perform a variety of exercises at multiple resistance ranges.

[0038] Reference Figures 1 to 7 The exercise bar 100 of this disclosure is shown. The exercise bar 100 includes a handle tube 110 configured to accommodate an end user (e.g., Figure 6 and Figure 7 The hands of the end user (610).

[0039] In some embodiments, the handle tube 110 is about 30 cm in length. In some embodiments, the handle tube 110 is about 35 cm in length. In some embodiments, the handle tube 110 is about 40 cm in length. In some embodiments, the handle tube 110 is about 50 cm in length. In some embodiments, the handle tube 110 is about 53 cm in length. In some embodiments, the handle tube 110 is about 53.34 cm in length (e.g., about 21 inches). In some embodiments, the handle tube 110 is about 54 cm in length. In some embodiments, the handle tube 110 is about 55 cm in length. In some embodiments, the handle tube 110 is about 60 cm in length. In some embodiments, the handle tube 110 is about 70 cm in length. In some embodiments, the handle tube 110 is about 80 cm in length. In some embodiments, the handle tube 110 is about 90 cm in length. In some embodiments, the handle tube 110 is about 100 cm in length. In some embodiments, the handle tube 110 is about 110 cm in length. In some embodiments, the handle tube 110 is approximately 120 cm in length. In some embodiments, the handle tube 110 is approximately 130 cm in length. In some embodiments, the handle tube 110 is approximately 131 cm in length. In some embodiments, the handle tube 110 is approximately 140 cm in length. In some embodiments, the handle tube 110 is approximately 150 cm in length. In some embodiments, the exercise bar 100 is approximately 160 cm in length. In some embodiments, the handle tube 110 is approximately 170 cm in length. In some embodiments, the handle tube 110 is approximately 180 cm in length. In some embodiments, the handle tube 110 is approximately 190 cm in length. In some embodiments, the handle tube 110 is approximately 200 cm in length. In some embodiments, the handle tube 110 is approximately 210 cm in length. In some embodiments, the handle tube 110 is approximately 220 cm in length (e.g., approximately the length of an Olympic barbell). In some embodiments, the handle tube 110 is between 50 cm and 300 cm in length. In some embodiments, the handle tube 110 is between 100cm and 250cm in length. In some embodiments, the handle tube 110 is between 150cm and 230cm in length.

[0040] Additionally, in some embodiments, the diameter of the handle tube 110 is 2.5 cm. In some embodiments, the diameter of the handle tube 110 is approximately 2.8 cm. In some embodiments, the diameter of the handle tube 110 is approximately 5 cm. In some embodiments, the diameter of the handle tube 110 is approximately 5.1 cm. In some embodiments, the diameter of the handle tube 110 is between 2.5 cm and 5.5 cm. In some embodiments, the diameter of the handle tube 110 is between 3.0 cm and 5.3 cm.

[0041] In some embodiments, the handle tube 110 includes one or more circumferential grip area types. For example, in some embodiments, the handle tube includes a first circumferential grip area type 112 and a second circumferential grip area type 114. In some embodiments, the first circumferential grip area type 112 is a horizontal (e.g., smooth) surface, while the second circumferential grip area type 114 is characterized by a pattern of straight lines, slanted lines, and / or intersecting lines (e.g., due to knurling). In some embodiments, the handle tube 110 includes a first end portion and a second end portion (e.g., a right-hand portion and a left-hand portion). Thus, in some embodiments, the second circumferential grip area type 114 is disposed at both the first and second end portions of the handle tube 110, while the first circumferential grip area is disposed on the handle tube 110 between the first and second end portions. When a user uses the exercise bar 100, the use of the circumferential grip area at least improves the end-user's grip. In some embodiments, the first and second end portions occupied by the second circumferential grip area type 114 are each between 10 cm and 30 cm in length. In some embodiments, the first and second end portions occupied by the second circumferential grip area type 114 together occupy between 35% and 65% of the total length of the handle tube 110.

[0042] In some embodiments, the handle tube 110 comprises a metallic material, such as a metal alloy (e.g., steel, iron, etc.). In some embodiments, the handle tube 110 is composed of a metal or a metal alloy (e.g., steel, iron, etc.). In some embodiments, the handle tube comprises austenitic steel (e.g., AISI grades 201, 202, 301, 302, 302B, 303, 303(Se), 304, 304L, 305, 308, 309, 309S, 310, 310S, 314, 316, 317, 321, 347, or 348, etc.), martensitic steel (e.g., AISI grades 403, 410, 414, 416, 416(Se), 420, 420F, 431, 440A, 440B, 440C, or 501, etc.), or ferritic steel (AISI grades 405, 429, 430, 430F, 430F(Se), 442, 446, or 502), such as McGraw-Hill, Inc.'s Marks' Standard Handbook. Those described in Table 6.2.18a of the 9th edition of the *Mechanical Engineers' Handbook* (1987, pp. 6-37). In some embodiments, the handle tube 110 comprises nickel alloys (e.g., Nickel 270, Nickel 200, Duranikel 301, Monel 400, Monel K-500, Hastelloy C, Incoloy 825, Inconel 600, Inconel 718, or TD Ni), such as those described in Table 6.4.7 of the 9th edition of the *Mechanical Engineers' Handbook of Symbols* (1987, pp. 6.72), which is incorporated herein by reference. In some embodiments, the handle tube 110 comprises high-strength low-alloy steel (HSLA). HSLA is an alloy steel that offers better mechanical properties or greater corrosion resistance compared to carbon steel. In some embodiments, HSLA steel has a carbon content between 0.05% and 0.25%. In some embodiments, HSLA steel contains up to 2.0% manganese and small amounts of copper, nickel, niobium, nitrogen, vanadium, chromium, molybdenum, titanium, calcium, rare earth elements, or zirconium.For further disclosures regarding HSLA steel that can be used to manufacture the handle tube 100, see Degarmo et al., Materials and Processes in Manufacturing (9th edition), 2003, Wiley, ISBN 0-471-65653-4; and Oberg et al., Machinery's Handbook (25th edition), 1996, Industrial Press Inc., each of which is incorporated herein by reference.

[0043] The use of metal typically increases the load-bearing capacity of the exercise bar 100. However, this disclosure is not limited thereto. For example, in some embodiments, all or part of the handle tube 110 is coated with an elastomer (e.g., a rubberized coating). Furthermore, in some embodiments, the handle tube 110 includes grip portions (e.g., foam grip portions and / or rubber grip portions, etc.) disposed around its circumference. In some such embodiments, the handle tube 110 includes one or more circumferential grip area types. For example, in some embodiments, the handle tube includes a first circumferential grip area type 112 and a second circumferential grip area type 114. In some embodiments, the first circumferential grip area type 112 is a horizontal (e.g., smooth) uncoated surface, while the second circumferential grip area type 114 is coated with an elastomer or foam. In some embodiments, the handle tube 110 includes a first end portion and a second end portion (e.g., a right-hand portion and a left-hand portion). Thus, in some such embodiments, the second circumferential grip area type 114 is disposed at both the first and second end portions of the handle tube 110, while the first circumferential grip area is disposed on the handle tube 110 between the first and second end portions. When a user uses the exercise bar 100, the circumferential grip area improves the end-user's grip. In some embodiments, the second circumferential grip area type 114 is coated with GR-S, neoprene, nitrile rubber, butyl rubber, polysulfide rubber, or ethylene propylene rubber (e.g., EPDM rubber), cyclic rubber (e.g., thermoplastic rubber). See, for example, sections 6-161 through 6-163 of the beginning of pp. 6.161 of McGraw-Hill, Inc.'s Standard Handbook of Mechanical Engineer's Notation, 9th Edition, 1987, which is incorporated herein by reference.

[0044] In some embodiments, the handle tube 110 includes a longitudinal internal hole (e.g., Figure 2(Longitudinal bore 202). Further, in some embodiments, the handle tube 110 includes a metal central shaft 150 fitted through the longitudinal internal bore 202. In some embodiments, the metal central shaft 150 is a solid rod (e.g., a solid metal central shaft). In some embodiments, the metal central shaft 150 is a hollow rod. Moreover, in some embodiments, the central shaft 150 comprises a metallic material (e.g., steel, iron, etc.). In some embodiments, the central shaft 150 comprises the same material as the handle tube 110. In some embodiments, the central shaft 150 comprises a material different from that of the handle tube 110. In some embodiments, the central shaft 150 comprises or is composed of a metal or metal alloy (e.g., steel, iron, etc.). In some embodiments, the central shaft 150 comprises austenitic steel (e.g., AISI models 201, 202, 301, 302, 302B, 303, 303(Se), 304, 304L, 305, 308, 309, 309S, 310, 310S, 314, 316, 317, 321, 347, or 348, etc.), martensitic steel (e.g., AISI models 403, 410, 414, 416, 416(Se), 420, 420F, 431, 440A, 440B, 440C, or 501, etc.), or ferritic steel (AISI models 405, 429, 430, 430F, 430F(Se), 442, 446, 502), such as McGraw-Hi The central shaft 150 comprises those described in Table 6.2.18a of McGraw-Hill, Inc.'s Standard Handbook of Mechanical Engineer's Notation, 9th Edition, 1987, pp. 6-37. In some embodiments, the central shaft 150 comprises nickel alloys (e.g., Nickel 270, Nickel 200, Duranikel 301, Monel 400, Monel K-500, Hastelloy C, Incoloy 825, Inconel 600, Inconel 718, or TD Ni), such as those described in Table 6.4.7 of McGraw-Hill, Inc.'s Standard Handbook of Mechanical Engineer's Notation, 9th Edition, 1987, p. 6.72 (which is incorporated herein by reference). In some embodiments, the central shaft 150 comprises high-strength low-alloy steel (HSLA).

[0045] In some embodiments, the central shaft 150 is fitted through the internal bore 202, such that a circumferential gap (e.g., an air cushion) is formed between the outer circumferential surface of the central shaft 150 and the inner circumferential surface of the handle tube 110. The fitting of the central shaft 150 exposes a first end portion of the central shaft 150 at the first end of the handle tube 110. Similarly, the fitting of the central shaft 150 through the longitudinal bore 202 exposes a second end portion of the central shaft at the second end of the handle tube 110. In some embodiments, the first and second end portions of the central shaft 150 are exposed by the same length (e.g., 1 cm). In some embodiments, the exposed length of the first and second end portions of the central shaft 150 is approximately equal to that of the handle end cap (e.g., ...). Figure 1 The length of the end cap 130. In some embodiments, the central shaft 150 includes one or more tapers. For example, in some embodiments, the central shaft 150 tapers gradually from a first end portion to a middle portion. In some embodiments, the central shaft 150 tapers gradually from a second end portion to a middle portion. The gradual taper of the central shaft 150 allows various components of the exercise bar 100 (e.g., bearing 152, washer 154, etc.) to be securely mounted on the central shaft.

[0046] Reference Figure 2 In some embodiments, the respective belt arm 140 is fitted onto a respective end portion of the central shaft 150. For example, in some embodiments, a first belt arm 140 is fitted onto a first end of the central shaft 150, and similarly, a second belt arm 140 is fitted onto a second end of the central shaft 150. Each respective belt arm 140 is configured to receive a portion of an elastic band. For example, in some embodiments, the first belt arm 140 is configured to receive a first elastic band (e.g., Figure 1 The first portion of the elastic band 190 is received by the second elastic band 190, and the second band arm 140 is configured to receive the first portion of the second elastic band 190 (e.g., each respective band arm receives the respective elastic band). However, this disclosure is not limited thereto. For example, in some embodiments, the first band arm 140 receives the first portion of the elastic band 190, while the second band arm 140 receives the second portion of the elastic band. Additional details and information regarding the configuration of one or more elastic bands will be described in more detail below, particularly with reference to at least [reference needed]. Figure 6 and Figure 7 Furthermore, in some embodiments, each corresponding belt arm 140 is made of metal (e.g., steel, iron, etc.). In some embodiments, each corresponding belt arm 140 is made of any of the materials disclosed above for the central shaft 150 and / or handle tube 110.

[0047] Additionally, in some embodiments, each corresponding strap arm 140 includes a hook area (e.g., Figure 1Region 142), the hook region is configured to receive a corresponding end portion of the elastic band 190. Each hook region 142 provides a gap between the corresponding band arm 140 and the handle tube 110, thereby allowing the elastic band 190 to be received by the band arm 140 through the gap. However, this disclosure is not limited thereto. For example, in some embodiments, each corresponding band arm 140 coupled to the handle tube 110 includes two or more portions. Thus, in some embodiments, one or more of the two or more coupling portions are removably coupled to the handle tube 110, thereby allowing the elastic band 190 to be accommodated by the corresponding band arm 140.

[0048] In the illustrated embodiment, each belt arm 140 includes a substantially horizontal portion 144. In some embodiments, the horizontal portion 144 spans a length approximately the width of the corresponding elastic band 190. The horizontal portion 144 allows the corresponding elastic band 190 to remain stationary while providing uniformly distributed resistance to the corresponding belt arm 140 (e.g., the corresponding band 190 rests flat against the corresponding belt arm 140). In some embodiments, the band 190 has a width between 5 cm and 30 cm, and accordingly, the horizontal portion 144 is long enough to accommodate the entire width of the band 190. In some embodiments, the band 190 has a width between 8 cm and 25 cm, and accordingly, the horizontal portion 144 is long enough to accommodate the entire width of the band 190.

[0049] In some embodiments, the exercise bar 100 includes corresponding handle end caps 130 (e.g., a first handle end cap 130 and a second handle end cap 130) for each respective end portion of the handle tube 110. Each corresponding end cap 130 includes a first end face (e.g., Figure 2 The inner surface 212) and the second end surface (e.g., Figure 2 The outer surface 214). In some embodiments, each corresponding handle end cap 130 includes a cylindrical outer surface (e.g., the outer surface 214). Figure 2 (External surface 216).

[0050] Reference Figure 4 and Figure 5 Each corresponding handle end cap 130 also includes a first drilled hole 218, which is disposed along the central axis of the corresponding handle end cap between a first surface 212 and a second surface 214 of the corresponding handle end cap. Therefore, referring to... Figure 3 The first and second corresponding end portions 302 of the central shaft 150 are fitted through the corresponding first drilled holes of the corresponding handle end cap 130 (for example, the first end portion 302a of the central shaft 150 is fitted through the first handle end cap 130, and the second end portion 302b of the central shaft is fitted through the second handle end cap 130).

[0051] In some embodiments, the exercise bar 100 includes a corresponding handle bearing for each end portion 302 of the bar (e.g., Figure 2 Each handle bearing 152 comprises a corresponding hollow cylindrical member having an inner circumferential surface and an outer circumferential surface (e.g., an inner diameter and an outer diameter). In some embodiments, each handle bearing 152 is a bushing. In some embodiments, each handle bearing 152 is made of a non-metallic material, such as nylon, polytetrafluoroethylene (PTFE), or another plastic material. In some embodiments, each handle bearing 152 is made of a metal (e.g., bronze). In some embodiments, each handle bearing 152 is made of a metal having a sintered or other porous structure. Additionally, in some embodiments, each handle bearing 152 is lubricated using mineral oil or a similar lubricant (such as a water-displacement lubricant). In some embodiments, each handle bearing 152 is made of any of the materials disclosed above for the central shaft 150 or the handle tube 110. While the handle bearing 152 may be made of any of the materials disclosed above for the central shaft 150 or the handle tube 110, there is no requirement that the handle bearing 152 be made of the same material as the central shaft 150 or the handle tube 110.

[0052] In some embodiments, each end portion 302 of the central shaft 150 is fitted through a corresponding cylindrical member of the handle bearing 152, wherein the outer circumferential surface of the corresponding cylindrical member of the handle bearing 152 contacts the inner circumferential surface of the central shaft 150, for example as... Figure 3 As shown. In some embodiments, the handle bearing 152 comprises a ball bearing, needle roller bearing, roller bearing, or other bearing mechanism. Additionally, the longitudinal internal bore of the handle tube 110 encloses and frictionally contacts the outer surface of each handle bearing 152, as shown. Figure 3 As shown. This frictional contact with the handle bearing 152 allows the handle tube 110 to rotate independently of the handle end cap 130 and the central shaft 150, which at least improves the range of motion and / or the amount of exercise that can be performed by the lever 100.

[0053] In some embodiments, the exercise bar 100 includes corresponding outer washers 154, which are fitted onto corresponding end portions of the central shaft 150. Thus, the first face of each outer washer 154 abuts against the end face of the corresponding cylindrical member 154 and is juxtaposed against the first face of the corresponding handle end cap 130.

[0054] Furthermore, in some embodiments, each corresponding strap arm 140 is fitted onto the corresponding end 302a of the central shaft 150 by attachment to the corresponding handle end cap 130. According to some embodiments, the details of this attachment are as follows: Figure 4 and Figure 5As shown in the figure. In some embodiments, the attachment of each corresponding arm 140 to the corresponding handle end cap 130 includes press-fit attachment, tenon and pin attachment (e.g., first pin and second pin) and other similar attachment mechanisms capable of supporting significant loads (e.g., such as 25 pounds, 100 pounds, 200 pounds... 500 pounds, 1000 pounds, 1500 pounds, etc.).

[0055] Reference Figure 4 and Figure 5 In some embodiments, each corresponding handle end cap 130 includes a second drilled hole (e.g., Figure 4 The second drill hole 442 is configured to receive the corresponding arm strap 140. In some embodiments, the second drill hole 442 is orthogonal to the first drill hole 218 (e.g., normal to a portion of the cylindrical outer surface 216 and extending to the central axis of the first cylindrical handle end cap 130, such as...). Figure 4 (As shown). Therefore, each corresponding armband 140 is attached to the corresponding handle end cap by slotting the first end of the armband 140 through the second drill hole 442 of the handle end cap.

[0056] In some embodiments, each corresponding end portion 302 of the central shaft 150 includes a notch for receiving a first end of a corresponding arm strap 140 (e.g., Figure 5 (The notch 502). For example, the first end portion 302a of the central shaft 150 includes a first notch 502 for receiving the first end portion of the first arm strap 140, and the second end portion 302b of the central shaft 150 includes a second notch 502 for receiving the first end portion of the second arm strap 140. Preferably, the first notch 502 and the second notch 502 are located on the same side of the central shaft 150, which allows each strap arm 130 to be at the same level and / or orientation, and provides a uniform distribution of resistance from the elastic band 190 during operation of the exercise bar 100. In addition, the notch 502 allows the corresponding strap arm 140 to be coupled to the central shaft 150, thereby allowing the central shaft to be within the handle tube 110 and to rotate independently of it.

[0057] In some embodiments, the exercise bar 100 includes a locking pin 134 for each respective end of the bar. In some embodiments, each handle end cap 130 includes a third drilled hole (e.g., Figure 4 Drilling 222 and / or Figure 1The third drill hole 222 is parallel to the first drill hole 218 between the first and second surfaces of the corresponding handle end cap 130, and passes through and is orthogonal to the second drill hole 442 of the handle end cap. Furthermore, the first end of each armband 140 includes a corresponding drill hole 242 configured to receive a locking pin 134 when it is slotted through the third drill hole 136 / 222. Therefore, by inserting the locking pin 134 through both the third drill hole 222 of the handle end cap 130 and the drill hole 242 of the first armband, each locking pin 134 locks the first end of the corresponding armband 140 to the corresponding handle end cap 130. In some embodiments, the locking pin 134 does not interfere with the corresponding washer 154 (e.g., the washer 154 is free to rotate).

[0058] Additionally, in some embodiments, reference is made to Figure 2 Each corresponding handle end cap 130 has a second end face 214 comprising a removably coupled cover 132. In some embodiments, the cover 132 is coupled to the corresponding handle end cap 130 via a locking pin 134. In some embodiments, the cover 132 is coupled to the corresponding handle end cap 130 via a press-fit (e.g., snap-fit) connection.

[0059] In some embodiments, the cover 132 includes each drill hole associated with the second end face 214 described above. For example, in some embodiments, the cover 132 includes corresponding drill holes 136, 222, 442, etc.

[0060] In some embodiments, the cover 132 secures the pin 134 via holes (e.g., hole 222) in the cover, while also optionally providing an aesthetically pleasing construction area for the designers of this disclosure. In some embodiments, the cover 132 includes graphics or artwork, such as a company logo. In some embodiments, the cover 132 includes a soft material such as rubber, which prevents the exercise bar 100 from unintentionally harming the surrounding environment and / or the end user.

[0061] In some embodiments, the cover 132 does not include the drilled holes (e.g., drilled holes 134 and 136) associated with the second end face 214 described above. In some embodiments, a third drilled hole 222 penetrates the corresponding handle end cap 130 and the cover 132. In some embodiments, the third drilled hole 222 penetrates the corresponding handle end cap 130 but does not penetrate the cover 132. Further, in some embodiments, the cover 132 is removably coupled to the second end face 214 and includes an uninterrupted surface (e.g., no holes through the cover 132). In some embodiments, the cover 132 is received by the corresponding handle end cap 130 (e.g., the cover is fitted into the end portion of the handle end cap). Moreover, in some embodiments, the corresponding handle end cap 130 is received by the cover 132 (e.g., the handle end cap is fitted into the end portion of the cover).

[0062] refer to Figure 6 and Figure 7 In some embodiments, this disclosure provides an exercise kit 600 for performing exercises. Figure 6 and Figure 7 In the illustrated embodiment, the end user performs an action from a first position (e.g., Figure 6 From the first position depicted in the text to the second position (e.g., Figure 7The exercise kit 600 includes a bicep curl (as depicted in the second position). In some embodiments, the exercise kit includes an exercise bar 100, a base 650, and one or more elastic bands 190 connecting the exercise bar to the base. In some embodiments, the base is made of CNC-milled marine-grade HDPE (high-density polyethylene). In some embodiments, each of the one or more elastic bands 190 has a unique elasticity or similar maximum resistance. For example, in some embodiments, the exercise kit 600 includes two elastic bands 190. The two elastic bands 190 include a first elastic band with a first maximum resistance (e.g., a low maximum resistance such as 5 lbs) and a second elastic band with a second maximum resistance different from the first maximum resistance (e.g., a high resistance such as 100 lbs). In some embodiments, the exercise kit 600 includes at least three exercise bands 190. In some embodiments, the at least three exercise bands 190 of the exercise kit 600 include a first elastic band 190-1 characterized by a first maximum resistance, a second elastic band 190-2 characterized by a second maximum resistance greater than the first maximum resistance, and a third elastic band 190-3 having a third maximum resistance greater than the second maximum resistance. In some embodiments, the corresponding maximum resistance of each band 190 is determined at least in part by the width and / or thickness of the band (e.g., a lower resistance band has a thinner width and / or thickness compared to a higher resistance band). For example, in some embodiments, a third band 190-3 has a width approximately the same length as the horizontal portion 144 of each band arm 140 (e.g., the width of the third band is approximately 75% to approximately 100% of the length of the horizontal portion of the band arm). In some embodiments, a second band 190-2 has a width less than the length of the horizontal portion 144 of each band arm 140 (e.g., the width of the second band is approximately 40% to approximately 75% of the length of the horizontal portion of the band arm). In some embodiments, a first band 190-1 has a width less than the length of the horizontal portion 144 of each band arm 140 (e.g., the width of the first band is approximately 5% to approximately 40% of the length of the horizontal portion of the band arm). In some embodiments, one or more elastic bands 190 of this disclosure comprise bands that are continuous flat loops (e.g., rehabilitation bands and / or fitting loop bands). In some embodiments, one or more elastic bands 190 of this disclosure include bands with handles (e.g., ankle bands, hard handles (such as plastic), soft handles (such as foam), etc.). Thus, in some embodiments, users can exercise using their bodies (e.g., feet, back, etc.) without the base 650.

[0063] In some embodiments, the elastic band 190 provides a maximum resistance of approximately 25 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 50 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 100 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 150 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 200 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 250 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 300 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 350 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 400 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 500 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of approximately 600 lbs to the end user of the exercise bar 100.

[0064] In some embodiments, the elastic band 190 provides a maximum resistance of 20 lbs to 60 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 25 lbs to 90 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 75 lbs to 125 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 110 lbs to 180 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 175 lbs to 240 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 230 lbs to 280 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 275 lbs to 325 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 325 lbs and 375 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 350 lbs and 425 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 400 lbs and 475 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 450 lbs and 650 lbs to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 650 lbs and 750 lbs to the end user of the exercise bar 100.

[0065] In some embodiments, the elastic band 190 provides a maximum resistance of 10 kg to 30 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 13 kg to 45 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 35 kg to 63 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 55 kg to 90 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 80 kg to 120 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 130 kg to 140 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance of 125 kg to 180 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 160 kg and 180 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 160 kg and 210 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 200 kg and 240 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 225 kg and 325 kg to the end user of the exercise bar 100. In some embodiments, the elastic band 190 provides a maximum resistance between 325 kg and 325 kg to the end user of the exercise bar 100.

[0066] In some embodiments, when the respective elastic band is in an unstretched state, each of the one or more elastic bands has a thickness of at least 1 cm and a length between 180 cm and 220 cm. In some embodiments, when the respective elastic band is in an unstretched state, each of the one or more elastic bands has a thickness of at least 1 cm, at least 1.5 cm, at least 2 cm, at least 2.5 cm, or at least 3.0 cm and a length between 100 cm and 220 cm or between 100 cm and 280 cm.

[0067] In some embodiments, this disclosure provides a first belt 190-1, which includes a thickness of about 5 mm, a width of about 0.8125 in, a length of about 41 in, and a force generation capacity of about 100 lbs. In some embodiments, this disclosure provides a second belt 190-2, which includes a thickness of about 5 mm, a width of about 1.125 in, a length of about 41 in, and a force generation capacity of about 160 lbs. In some embodiments, this disclosure provides a third belt 190-1, which includes a thickness of about 5 mm, a width of about 1.75 in, a length of about 41 in, and a force generation capacity of about 240 lbs. In some embodiments, this disclosure provides a fourth belt 190-1, which includes a thickness of about 5 mm, a width of about 2.5 in, a length of about 41 in, and a force generation capacity of about 300 lbs.

[0068] Advantageously, the disclosed exercise kit is a variable resistance device, meaning that the further the user extends the elastic band 190°, the greater the resistance applied. Thus, for example, when the user extends the band beyond its relaxed state by a first distance, the band applies a first resistance (e.g., 80 pounds). When the user extends the band beyond the first distance to a second distance beyond the first state, the band applies a second resistance greater than the first resistance (e.g., 200 pounds). When the user extends the band beyond the second distance to a third distance beyond the first and second distances, the band applies a third resistance greater than the second resistance (e.g., 350 pounds), and so on, until the user can no longer apply force to the band or reaches the band's maximum resistance. In other words, the resistance (tension in the muscles) varies (changes) as the user performs the exercise. The resistance is lower when the user begins repetitions and is highest when the user ends the repetitions. This is advantageous because the exercise kit provides lower resistance at shorter application distances (where the body joints are at risk) and higher resistance at longer application distances (where improved biomechanics occur). The disclosed variable resistance exercise kit differs from free weights. Free weights such as barbells and dumbbells provide constant resistance.

[0069] In some embodiments, the user performs an exercise (whereby the user initially applies force to the exercise bar 100 across its entire range of motion, for example, between (i) a region where the elastic band 190 applies high resistance (e.g., the third resistance described above) and (ii) a relaxed state where the elastic band 190 applies no resistance or applies minimal resistance) for a period of time until the user is no longer able to apply force to the exercise bar 100 across the entire range of motion of the elastic band. Next, the user applies force to the exercise bar 100 across an intermediate range of motion (e.g., between (i) a region where the elastic band 190 applies less than the highest resistance (e.g., the second resistance described above) and (ii) a relaxed state where the elastic band 190 applies no resistance or applies minimal resistance) for a period of time until the user is no longer able to apply force to the exercise bar 100 across the intermediate range of motion. Next, in some embodiments of the exercise, the user applies force to the exercise bar 100 within a minimum range of motion (e.g., between (i) a region where the elastic band 190 applies less than intermediate resistance (e.g., the first resistance described above) and (ii) a relaxed state where the elastic band 190 is not applied or applies minimal resistance) for a series of periods until the user can no longer apply force to the exercise bar 100 through the minimum range of motion. At this point, the user can no longer apply force to the exercise bar through any of the aforementioned ranges of motion until a later time, that is, when the user has reached absolute fatigue. In this way, osteogenic stimulation is achieved through this gradually decreasing range of motion. Thus, a program of regularly performing this exercise results in increased muscle strength.

[0070] In some embodiments, the systems (e.g., exercise kit 600) and devices (e.g., exercise bar 100) of this disclosure are used to perform one or more exercises, such as standing chest press, standing row, triceps pushdown, front squat, deadlift, bent-over barbell row, bicep curl, calf raise, and standing shoulder press. In some such embodiments, such exercises are performed as described above, starting with the full range of motion and gradually decreasing with constant but variable resistance as fatigue develops.

Claims

1. An exercise bar, comprising: Handle tube with longitudinal internal bore; A solid metal central shaft, wherein the solid metal central shaft is fitted through the longitudinal internal hole, and wherein the solid metal central shaft rotates longitudinally independently of the handle tube; A first belt arm, comprising a first end and a hook region, the first end of the first belt arm being received by a first notch at a first end portion of a solid metal central shaft, and the hook region of the first belt arm removably receiving a first portion of an elastic band; and The second belt arm includes a first end and a hook region. The first end of the second belt arm is received by a second notch at a second end portion of a solid metal central shaft, and the hook region of the second belt arm removably accommodates a second portion of an elastic band.

2. The exercise bar according to claim 1, wherein a first end portion of the solid metal central shaft is exposed at a first end of the handle tube, and a second end portion of the solid metal central shaft is exposed at a second end of the handle tube.

3. The exercise bar according to claim 2, further comprising: A first cylindrical handle end cap, which is connected to the first end portion of a solid metal central shaft; and The second cylindrical handle end cap is connected to the second end portion of the solid metal central shaft.

4. The exercise bar according to claim 3, wherein The first cylindrical handle end cap has a first end face, a second end face, and a cylindrical outer surface, as well as a first drilled hole along the central axis of the first cylindrical handle end cap between the first end face and the second end face. The second cylindrical handle end cap has a first end face, a second end face, and a cylindrical outer surface, as well as a first drilled hole along the central axis of the second cylindrical handle end cap between the first end face and the second end face. The first end portion of the solid metal central shaft is fitted through a first drilled hole in the first cylindrical handle end cap. The second end portion of the solid metal central shaft is fitted through the first drilled hole in the second cylindrical handle end cap. The first arm is attached to the first end portion of the solid metal central shaft by being attached to the first cylindrical handle end cap, and The second belt arm is attached to the second end portion of the solid metal central shaft by being attached to the second cylindrical handle end cap.

5. The exercise bar according to claim 4, further comprising: A first handle bearing, the first handle bearing comprising a first hollow cylindrical member having an inner circumferential surface and an outer circumferential surface; and The second handle bearing includes a second hollow cylindrical member having an inner circumferential surface and an outer circumferential surface, wherein... The first end portion of the solid metal central shaft is fitted through the first handle bearing, wherein the solid metal central shaft contacts the inner circumferential surface of the first handle bearing. The second end portion of the solid metal central shaft is fitted through the second handle bearing, wherein the solid metal central shaft contacts the inner circumferential surface of the second handle bearing, and The longitudinal inner hole of the handle tube encloses and frictionally contacts the outer circumferential surfaces of the first and second handle bearings.

6. The exercise bar according to claim 5, further comprising: A first outer washer, the first outer washer being fitted onto a first end portion of the solid metal central shaft; and A second outer washer is fitted onto the second end portion of the solid metal central shaft, wherein... The first surface of the first outer washer abuts against the end face of the first hollow cylindrical component of the first handle bearing. The second surface of the first outer washer, opposite to the first surface of the first outer washer, abuts against the first end surface of the first cylindrical handle end cap. The first surface of the second outer washer abuts against the end face of the second hollow cylindrical component of the second handle bearing, and... The second surface of the second outer washer, which is opposite to the first surface of the second outer washer, abuts against the first end surface of the second cylindrical handle end cap.

7. The exercise bar according to claim 4, wherein The first cylindrical handle end cap has a second drilled hole, which is orthogonal to the first drilled hole of the first cylindrical handle end cap. The second drilled hole of the first cylindrical handle end cap extends between the cylindrical outer surface of the first cylindrical handle end cap and the central axis. The second cylindrical handle end cap has a second drilled hole, which is orthogonal to the first drilled hole of the second cylindrical handle end cap. The second drilled hole of the second cylindrical handle end cap extends between the cylindrical outer surface of the second cylindrical handle end cap and the central axis. By slotting the first end of the first strap arm through a second drilled hole in the first cylindrical handle end cap, the first strap arm is attached to the first cylindrical handle end cap. The second belt arm is attached to the second cylindrical handle end cap by slotting the first end of the second belt arm through the second drilled hole of the second cylindrical handle end cap.

8. The exercise bar according to claim 1, wherein the first notch and the second notch are arranged on the first side of the solid metal central shaft.

9. The exercise bar according to claim 1, wherein the handle tube includes a first circumferential grip area and a second circumferential grip area on the outer circumferential surface of the handle tube.

10. The exercise bar according to claim 9, wherein The first circumferential gripping area is a horizontal surface, and The second circumferential gripping area is characterized by a pattern of straight lines, inclined lines, intersecting lines, or combinations thereof.

11. The exercise bar according to claim 10, wherein The second circumferential gripping area is located at both the first and second ends of the handle tube, and The first circumferential gripping area is located between the first end and the second end of the handle tube.

12. The exercise bar according to claim 1, wherein The first belt arm is made of metal, and The second belt arm is made of metal.

13. The exercise bar of claim 12, wherein a third portion of the elastic band is received by a portion of the base, thereby connecting the exercise bar to the base via the elastic band.

14. The exercise bar according to claim 1, wherein the solid metal central shaft is made of metal or a metal alloy.

15. The exercise bar according to claim 1, wherein the solid metal central shaft or the handle tube is made of austenitic steel, martensitic steel, ferritic steel, nickel alloy or high-strength low-alloy steel.

16. The exercise bar of claim 15, wherein the solid metal central shaft is made of a metal material different from that of the handle tube.

17. The exercise bar according to claim 1, wherein The length of the handle tube is between 40 cm and 80 cm, and The diameter of the handle tube is between 3 cm and 5 cm.

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