FR3109095A1 - Muscle building bar - Google Patents

Abstract

The invention relates to a muscle building bar (1) comprising a central grip portion (3) separating a first end (2a) for receiving a first weight (7a) and a second end (2b) for receiving a second weight. (7b). According to the invention, the muscle strengthening bar (1) comprises a first fixing means (4a) and a second fixing means (4b) positioned symmetrically with respect to the central gripping part (3), each fixing means ( 4a, 4b) being positioned between one of the ends (2a, 2b) and the central gripping part (3) and being intended to be connected to one end (6a, 6b) of a rope (5a). Figure to be published with the abstract: Fig. 2

Description

muscle building bar

The invention relates to a muscle building bar and to a muscle building assembly comprising such a muscle building bar.

Sports equipment is often specific to a specific function or exercise. The exercise possibilities are therefore often limited.

This is particularly the case in the field of muscle building.

We know the weight bars called "Pump" bars having two ends on which are mounted variable disc-shaped weights.

They are used in group classes in fitness rooms. These are muscle building classes with the same name: "Pump". A "Pump" bar typically measures between 130 cm and 132 cm and see up to 140 cm. The bar is 28mm in diameter.

The space in the center of the bar is dedicated to the different possible hand placements. It measures between 98 cm and 1 m.

The end parts of the bar that can carry the weights measure between 15 cm and 16 cm. They are intended to receive the weights and stop-discs preventing them from falling.

There are also known suspended pull-up bars attached to two side supports or to a ceiling allowing pull-up work using the weight of the body.

However, these pull-up bars only allow you to perform one type of physical exercise and only strengthen a limited part of the body.

In addition, these bars do not adapt to a very wide range of different user levels, nor to a very wide range of difficulties.

And then, the use of a barbell with weights can cause trauma to the joints, especially for beginners. This tool is not suitable for beginners or people with a low level.

The object of the invention is therefore to overcome the drawbacks of the prior art by proposing a muscle strengthening bar allowing several types of exercises to be carried out at the same time, in a progressive manner to avoid joint trauma and suitable for all levels. .

The invention relates to a muscle building bar comprising a central gripping part separating a first end intended to receive a first weight and a second end intended to receive a second weight.

According to the invention, the muscle building bar comprises a first fixing means and a second fixing means positioned symmetrically with respect to the central gripping part. Each fastening means is positioned between one of the ends and the central gripping part and is intended to be connected to one end of a rope.

The invention thus provides a modular muscle building bar that offers a wider range of bodybuilding techniques and maximum adaptability to all audiences likely to use it (young, elderly, beginners or experienced practitioners).

The muscle building bar combines several barbell bodybuilding techniques in a single tool.

This material offers more possibilities than a simple weight bar or a simple pull-up bar, with the possibility of using additional rubber bands.

The use of rubber bands makes it possible, in a first case, to facilitate the exercise for the beginner, in a second case, to add difficulty for the experienced practitioner, and in a third case, to do muscle work exclusively with rubber bands. . This last method being the least traumatic for the joints (intended for people who want to train in a gentler way).

Preferably, the muscle building bar comprises a third fixing means and a fourth fixing means positioned symmetrically with respect to the central gripping part. Each of the fastening means is positioned between one of the ends and the central gripping part and is intended to be connected to one end of an additional rope.

The invention thus makes it possible to carry out several bodybuilding variants.

It allows its user to practice classic bodybuilding with weights or with rubber bands or by suspending the weight of the body with straps.

It also makes it possible to combine the three previous working methods or functions with each other (weight, elastics and suspension with straps).

It is possible to use the cast iron with one or two rubber bands (for more difficulty) or the suspension system with rubber bands or straps to help the beginner to progress.

The combination of these three bodybuilding methods (weight, suspension and rubber bands) allows a wider choice of muscle strengthening exercises with the same bar.

Advantageously, the fixing means are attached to the muscle building bar adjacent to the ends so as to form a stop for the weights when they are mounted on the muscle building bar.

The fastening means thus have a dual function, allowing the use of fewer elements.

Preferably, the attachment means are each formed of an arch-shaped element (or bridge) extending in the direction of the central axis and comprising two legs welded to the muscle strengthening bar.

The orientation of the arch-shaped elements in this direction has the function of being able to attach carabiners to them, without the latter being hindered by the weights resting against the arch-shaped elements when the muscle strengthening bar is loaded. Indeed, the arch-shaped elements also serve as disc stops or stops to prevent the weights (cast iron discs) from sliding towards the center of the muscle strengthening bar.

Advantageously, the first attachment means and the third attachment means are mounted in opposition and symmetrically with respect to the central axis of the muscle building bar. The second attachment means and the fourth attachment means are mounted in opposition and symmetrically with respect to the central axis of the muscle strengthening bar.

This improves weight locking.

Alternatively, the first attachment means is offset relative to the third attachment means. The second attachment means is offset relative to the fourth attachment means. The first attachment means and the second attachment means are mounted in rotation relative to the muscle strengthening bar and around the central axis. The third attachment means and the fourth attachment means are mounted fixed on the muscle building bar.

The rotational motion provides comfort during strength exercises.

During a rotational movement, the muscle strengthening bar tends to rotate in the palm of the hand, unless you squeeze it very tightly at the risk of forming blisters on the hands.

For more comfort, the two attachment points for the elastic rotate freely around the muscle reinforcement bar to facilitate rotational movements.

Advantageously, the muscle building bar comprises an abutment fixed thereto and adjacent to each end. The first fixing means and the second fixing means are positioned contiguous to the stops to limit the movement of these fixing means in the direction of the central axis.

As a variant, the first fixing means is formed by a first orifice and the third fixing means is formed by a second orifice. The first and second orifices are positioned on the same first cylindrical support. The second fixing means is formed by a third orifice and the fourth fixing means is formed by a fourth orifice. The third and fourth orifices are positioned on the same second cylindrical support. Each cylindrical support comprises a central hole through which the muscle strengthening bar passes.

Preferably, the muscle building bar comprises a first removable end and a second removable end fixed in a removable manner to the central gripping part by first holding means.

It is thus possible to reduce the size of the muscle building bar during transport thanks to this bar dismantling system.

This makes it easier to transport the muscle building bar by dismantling the removable ends which are intended to support the weights. This makes it easier to store in a storage bag or car trunk.

Advantageously, the muscle building bar comprises a first bar portion fixed to a second bar portion in a removable manner by second holding means.

This further reduces the bulk of the muscle building bar for transport.

The invention also relates to a muscle building assembly comprising a muscle building bar as defined previously and at least one muscle building accessory mounted or fixed on the muscle building bar.

The muscle-strengthening accessory comprises a first weight mounted on a first end of the muscle-strengthening bar and a second weight mounted on a second end of the muscle-strengthening bar and/or at least one elastic cord fixed to the first means of attachment and/or on the second attachment means and/or an additional non-elastic cord attached to the third attachment means and a second additional non-elastic cord attached to the fourth attachment means.

There will be described below, by way of non-limiting examples, embodiments of the present invention, with reference to the appended figures in which:

schematically illustrates a muscle building bar comprising a first weight mounted on a first end and a second weight mounted on a second end of the bar, according to one embodiment of the invention;

schematically illustrates the muscle building bar of Figure 1 comprising the two weights and a rubber band attached to the first and second fastening means;

schematically illustrates the muscle building bar of Figure 1 comprising the two weights, a rubber band attached to the first and second attachment means, a first strap attached to the third attachment means and a second strap attached to the fourth attachment means;

schematically illustrates a muscle building bar comprising a cylindrical support for attaching an elastic band and/or a strap, according to another embodiment;

schematically illustrates a front view of the cylindrical support of Figure 4;

schematically illustrates a side view of the cylindrical support of Figure 4;

schematically illustrates an athlete using the muscle-strengthening bar of FIG. 4 comprising a first rubber band hooked to the first fixing means and a second rubber band hooked to the second fixing means;

schematically illustrates a muscle building bar comprising first and second rotationally movable attachment means and third and fourth fixed attachment means, according to another embodiment;

schematically illustrates the muscle building bar of Figure 8 comprising two weights, a rubber band attached to the first and second attachment means, a first strap attached to the third attachment means and a second strap attached to the fourth attachment means;

schematically illustrates a muscle building bar comprising two removable ends comprising first holding means;

schematically illustrates a muscle building bar comprising two removable ends comprising first holding means, according to another variant;

schematically illustrates a muscle building bar comprising two removable ends and a central gripping part comprising two detachable parts.

FIG. 1 represents a muscle building bar 1 extending longitudinally along a central axis 12. The muscle building bar 1 has a central gripping part 3 separating a first end 2a intended to receive a first weight 7a and a second end 2b intended to receive a second weight 7b.

The muscle building bar 1 has a straight tubular shape and is made of metal. It has a cylindrical shape. It can be hollow or solid.

By way of example, muscle building bar 1 can be a steel tube 28 mm in diameter and 2 mm thick. It measures between 130 cm and 132 cm and see up to 140 cm, corresponding to a standard "Pump" bar.

The central gripping part 3 is dedicated to the different possible hand placements. It measures between 98 cm and 1 m.

The ends 2a, 2b of the muscle building bar 1 which can carry the weights 7a, 7b, measure between 15 cm and 16 cm long.

The dimensions of this muscle building bar 1 are ideal for the proper execution of various exercises. In addition, the length is suitable to provide a small bodybuilding equipment convenient to carry.

According to the invention, the muscle building bar 1 comprises a first fixing means 4a and a second fixing means 4b positioned symmetrically with respect to the central gripping part 3. The first fixing means 4a is positioned between the first end 2a and the central gripping part 3. The second fixing means 4b is positioned between the second end 2b and the central gripping part 3.

The central gripping part 3 is centered on the muscle strengthening bar 1.

The first attachment means 4a is intended to be connected to a first end 6a of a rope 5a, 5b. The second fixing means 4b is intended to be connected to a second end 6b of this rope 5a, 5b.

The cord 5a, 5b may or may not be elastic. For example, it can be a strap or an elastic rope.

Figure 2 describes an example in which the cord 5a, 5b is an elastic 5a, 5b. This rope 5a, 5b has two ends 6a, 6b respectively connected to the first and second fastening means 4a, 4b by carabiners 28 or equivalent.

This configuration makes it possible to perform “back pull” exercises.

Alternatively, the two ends 6a, 6b of a first elastic cord 5a can be connected to the first fastening means 4a and the two ends 6a, 6b of a second elastic cord 5b can be connected to the second fastening means 4b, as shown in figure 7.

This makes it possible to obtain a longer length of elastic and to perform “squat” exercises.

According to another variant of use, it is possible to use two elastic bands 5a, 5b of the same tension connected in series, including a first elastic band 5a having a first end 6a hooked to the first fixing means 4a and a second end 6b hooked to a first end 6a of a second elastic 5b. The second end 6b of the second elastic 5b is attached to the second fastening means 4b.

The use of two rubber bands increases the range of motion and maintains the ideal tension corresponding to each exercise. Another usefulness is to avoid causing the elastic to break when it is used alone during large amplitude movements.

As illustrated in Figure 1, the muscle strengthening bar 1 also comprises a third attachment means 8a and a fourth attachment means 8b positioned symmetrically with respect to the central gripping part 3. The third attachment means 8a is positioned between the first end 2a and the central gripping part 3. The fourth fixing means 8b is positioned between the second end 2b and the central gripping part 3.

The third attachment means 8a is intended to be connected to a first end 23a of a first additional cord 9a. The fourth fixing means 8b is intended to be connected to a first end 23b of a second additional cord 9b.

The additional strings 9a, 9b may or may not be elastic. Preferably, each additional cord 9a, 9b is a strap.

As a variant, the muscle building bar 1 may comprise only the first and second fixing means 4a, 4b or only the third and fourth fixing means 8a, 8b.

The fixing means 4a, 4b, 8a, 8b are adjacent to the respective ends 2a, 2b of the muscle building bar 1 so as to form a stop for the weights 7a, 7b when they are mounted on the ends 2a, 2b of muscle building bar 1.

If the muscle building bar 1 comprises only the first and second fixing means 4a, 4b, only the latter form a stop for the weights 7a, 7b.

The weights 7a, 7b preferably have the shape of a disc and an orifice into which the ends 2a, 2b of the muscular reinforcement bar 1, of circular section, are inserted.

The weights 7a, 7b have a first face 24 which is in contact with the fixing means 4a, 4b, 8a, 8b.

The weights 7a, 7b have a second face 25, opposite the first face 24, which is in contact with a stop-disc 26.

As illustrated in the examples of Figures 1 to 4, the fixing means 4a, 4b, 8a, 8b are preferably formed of an arch-shaped element 10, such as a bridge.

The arch-shaped elements 10 can be a "U" shaped ring. Other shapes are possible such as semi-circular shapes.

Each arch-shaped element 10 comprises two legs 27 welded to the muscle building bar 1. The arch-shaped elements 10 extend along the central axis 12 of the muscle building bar 1.

The orientation of the arch-shaped elements 10 in this direction has the function of being able to attach carabiners 28 thereto, without these being hindered by the weights 7a, 7b resting against the arch-shaped elements 10 when muscle bar 1 is loaded. Indeed, the arcade-shaped elements 10 also serve as disc stops or stops to prevent the weights 7a, 7b (cast iron discs) from sliding towards the center of the muscle building bar 1.

The arch-shaped elements 10 of the first fastening means 4a and the arch-shaped elements 10 of the third fastening means 8a are mounted in opposition and symmetrically with respect to the central axis 12 of the muscle building bar 1 .

Similarly, the arch-shaped elements 10 of the second fastening means 4b and the arch-shaped elements 10 of the fourth fastening means 8b are mounted in opposition and symmetrically with respect to the central axis 12 of the bar. muscle building 1.

The four arch-shaped elements 10 form four attachment points allowing the rope 5a, 5b and two additional ropes 9a, 9b to be attached thereto at the same time, as illustrated in FIG. 3. Two attachment points are formed. hangs above muscle building bar 1 and two hanging points below muscle building bar 1 (relative to the plane of Figures 1 to 4).

Preferably, the cord 5a, 5b is an elastic cord or a rubber band 5a, 5b. The additional rope 9a, 9b is non-elastic like a suspension strap, for example.

This allows the use of muscle strengthening bar 1 in suspension. The advantage over a conventional fixed pull-up bar is that you can use height-adjustable straps 9a, 9b.

This use with straps 9a, 9b has the primary purpose of being able to do exercises other than pull-ups thanks to the possibility of choosing the height of the bar.

The second purpose of the straps 9a, 9b is to be able to adapt to all levels of practice, depending on the height adjustment.

For example, an advanced practitioner will set the muscle reinforcement bar 1 high to perform their pull-ups in order to have their feet in the void, while a beginner practitioner will lower the height of the muscle reinforcement bar 1 to learn how to do their pull-ups feet on the ground, playing on the inclination of the body to regulate the difficulty.

Adaptability is the main advantage of this material.

The muscle building bar 1 offers another interesting possibility in suspension.

In fact, its four attachment points allow the muscle strengthening bar 1 to be suspended and an elastic band 5a, 5b to be added to it to help progress in certain exercises, as shown in figure 3.

Finally, the third purpose of using the muscle building bar 1 with straps 9a, 9b is to be able to hang on to any place and without worrying about the height under the ceiling.

Muscle building bar 1 can be used suspended from a beam, a branch or any other solid support.

FIG. 3 represents an example in which the muscle-strengthening bar 1 is used in suspension with two fixings 29a, 29b each fixed to two opposite walls 30a, 30b. Each binding 29a, 29b comprises a plate 31a, 31b equipped with a hooking ring 32a, 32b.

More practically, the attachment rings 32a, 32b can be replaced by carabiners.

The purpose of this improvement is to allow everything to be put away at the end of training, to be able to unhook the straps 9a, 9b also, quickly, and without modifying their setting each time.

Alternatively, and as shown in Figures 5 to 7, the first attachment means 4a is formed by a first orifice 16a and the third attachment means 8a is formed by a second orifice 17a. The first and second orifices 16a, 17a are positioned on the same first cylindrical support 14a.

The second fixing means 4b is formed by a third orifice 16b and the fourth fixing means 8b is formed by a fourth orifice 17b. The third and fourth orifices 16b, 17b are positioned on the same second cylindrical support 14b.

Each cylindrical support 14a, 14b comprises a central orifice 15a, 15b through which the muscle strengthening bar 1 passes and separating the orifices 16a, 17b.

Each cylindrical support 14a, 14b is attached to muscle building bar 1.

The cylindrical supports 14a, 14b also serve as abutment for the weights 7a, 7b.

Alternatively and as illustrated in Figures 8 to 12, the first attachment means 4a is offset from the third attachment means 8a. The second fixing means 4b is offset with respect to the fourth fixing means 8b.

According to a preferred embodiment and as shown in Figures 8 to 12, the first attachment means 4a and the second attachment means 4b are mounted in rotation relative to the muscle strengthening bar 1 and around the central axis 12 The third attachment means 8a and the fourth attachment means 8b are mounted fixed on the muscle strengthening bar 1.

The muscle building bar 1 comprises two stops 13a, 13b fixed to the muscle building bar 1 and each adjacent to one of the ends 2a, 2b. The first fixing means 4a is positioned between a first abutment 13a and the third fixing means 8a and is contiguous to the latter to limit the transverse displacement of the first fixing means 4a in the direction of the central axis 12.

Similarly, the second fastening means 4b is positioned between a second abutment 13b and the fourth fastening means 8b and is contiguous to the latter to limit the transverse displacement of the second fastening means 4b in the direction of the central axis 12.

Each stop 13a, 13b has a cylindrical shape with a central orifice through which the muscle strengthening bar 1 passes.

As illustrated in Figure 8, the fixing means 4a, 4b, 8a, 8b are formed of an arch-shaped element 10 or ring in the shape of a "U". Other shapes are possible such as semi-circular shapes.

Each arch-shaped element 10 comprises two legs 27 welded to a washer 33 of cylindrical shape with a central hole through which the muscle strengthening bar 1 passes.

The arch-shaped elements 10 extend along the central axis 12 of the muscle building bar 1.

This improvement provides comfort during weight training exercises thanks to the rotational movement.

According to a preferred method of use illustrated in Figure 9, the first mobile fixing means 4a is connected to a first end 6a of a cord 5a, 5b which in this example is an elastic band 5a. The second mobile fixing means 4b is connected to a second end 6 of this rope 5a, 5b.

The third fixed fixing means 8a is connected to a first end 23a of a first additional rope 9a. The fourth fastening means 8b is connected to a first end 23b of a second additional cord 9b.

In this example, the first and second additional strings 9a, 9b are formed from two straps 9a, 9b.

Connections are made using carabiners 28.

During a rotational movement the muscle building bar 1 tends to rotate in the palm of the hand, unless you squeeze it very hard at the risk of blisters forming on the hands.

For more comfort, the two attachment points for the elastic 5a, 5b rotate freely around the muscle reinforcement bar 1 to facilitate rotational movements.

Two fixed attachment points for the strap 9a, 9b are retained for stability during suspension exercises and two mobile attachment points for the elastic 5a, 5b are then provided for more comfortable use with the elastics 5a, 5b when the muscle building bar 1 is attached to a support by the straps 9a, 9b.

According to a possible variant illustrated in Figures 10 and 11, the muscle building bar 1 comprises a first removable end 19a and a second removable end 19b removably fixed to the central gripping part 3 by first holding means 20. The removable first end 19a and removable second end 19b can be removed from the muscle building bar 1.

FIG. 10 represents first holding means 20 comprising a thread 34 formed on the second removable end 19b which is intended to be screwed into a threaded orifice 35 provided at one end 36 of the central gripping part 3.

Alternatively and as illustrated in Figure 11, the first holding means 20 comprise an interlocking system with square tubes and fixing by pins.

The second removable end 19b comprises a tubular portion 37 of square section which is nestable in a housing of square section 38 provided at one end 36 of the central gripping part 3.

The tubular portion 37 comprises an orifice 39. The third and fourth fixing means 8a, 8b also comprise an orifice 40. When the tubular portion 37 of the second removable end 19b is inserted into the square section housing 38 of the central part of grip 3, a pin 41 is inserted into these two aligned holes 39, 40 to block the second removable end 19b on the central gripping part 3 of the muscle building bar 1.

The square tube has the advantage of facilitating assembly/disassembly. With a square tube, the holes 39, 40 are always aligned to insert the pins 41 without difficulty (without having to look for the correct alignment of the holes as is the case with circular sections).

It is thus possible to reduce the size of the muscle building bar 1 during transport thanks to this system for dismantling the bar.

This makes it possible to transport the muscle building bar 1 more easily by removing the removable ends 19a, 19b which are intended to support the weights 7a, 7b. This makes it easier to store in a storage bag or car trunk.

As said before, muscle building bar 1 is between 130cm and 140cm long. The first and the second removable end 19a, 19b each measure between 15 cm and 20 cm long.

After dismantling, the central gripping part 3 of the muscle building bar 1 measures less than one meter.

A bar about one meter long fits the width of a car trunk, while a bar 140 cm long does not.

According to another embodiment illustrated in Figure 12, the muscle building bar 1 comprises a first bar portion 21 fixed to a second bar portion 21' in a removable manner by second holding means 22.

The second holding means 22 may be identical to the first holding means 20.

The second holding means 22 may comprise a thread formed on the first bar portion 21 which is intended to be screwed into a threaded hole provided at one end of the second bar portion 21'.

Preferably and as illustrated in Figure 12, the second holding means 22 comprise a fitting system with square tubes and fixing by pins.

A first bar portion 21 comprises a tubular portion 42 of square section, opposite to the associated end part 2, which is nestable in a square section housing 43 provided at one end 44 of a second bar portion 21 ', opposite to the end part 2 associated.

The tubular portion 42 includes an orifice 45. The second bar portion 21' also includes an orifice 46. When the tubular portion 42 of the first bar portion 21 is inserted into the square section housing 43 of the second bar portion 21 ', a pin is inserted into these two holes 45, 46 aligned to fix the two bar portions 21, 21' together.

The combination of this assembly/disassembly system of two bar portions 21, 21' with the removable ends 19a, 19b makes it possible to further reduce the size of the muscle building bar 1 for its transport.

The various fastening means described previously can be combined.

As a variant, it is also possible to use this assembly/disassembly system for two bar portions 21, 21' with fixed, non-removable ends 2a, 2b.

The invention also relates to a muscle building assembly comprising a muscle building bar 1 as defined above and at least one muscle building accessory mounted or fixed on the muscle building bar 1.

The muscle building accessory may comprise a first weight 7a mounted on a first end 2a of the muscle building bar 1 and a second weight 7b mounted on a second end 2b of the muscle building bar 1 and/or at least one rope elastic 5a, 5b fixed to the first fixing means 4a and/or to the second fixing means 4b and/or a first non-elastic additional cord 9a fixed to the third fixing means 8a and a second non-elastic additional cord 9b fixed to the fourth fixing means 8b, as previously described.

Claims (10)

Muscle strengthening bar (1) comprising a central gripping part (3) separating a first end (2a) intended to receive a first weight (7a) and a second end (2b) intended to receive a second weight (7b), characterized in that it comprises a first fixing means (4a) and a second fixing means (4b) positioned symmetrically with respect to the central gripping part (3), each fixing means (4a, 4b) being positioned between the one of said ends (2a, 2b) and the central gripping part (3) and being intended to be connected to one end (6a, 6b) of a rope (5a, 5b). Muscle strengthening bar (1) according to claim 1, characterized in that it comprises a third fixing means (8a) and a fourth fixing means (8b) positioned symmetrically with respect to the central gripping part (3), each of said fastening means (8a, 8b) being positioned between one of said ends (2a, 2b) and the central gripping part (3) and being intended to be connected to one end (23a, 23b) of a rope additional (9a, 9b). Muscle strengthening bar (1) according to any one of Claims 1 or 2, characterized in that the fixing means (4a, 4b, 8a, 8b) are fixed to the muscle strengthening bar (1) adjacent to the ends (2a, 2b) so as to form a stop for the weights (7a, 7b) when they are mounted on the muscle strengthening bar (1). Muscle strengthening bar (1) according to any one of Claims 2 or 3, characterized in that the fixing means (4a, 4b, 8a, 8b) are each formed of an element in the form of an arch (10) extending in the direction of the central axis (12) and comprising two legs (27) welded to the muscle strengthening bar (1). Muscle strengthening bar (1) according to Claim 4, characterized in that the first fixing means (4a) and the third fixing means (8a) are mounted in opposition and symmetrically with respect to the central axis (12) of the muscle building bar (1), the second fixing means (4b) and the fourth fixing means (8b) being mounted in opposition and symmetrically with respect to the central axis (12) of the muscle building bar (1 ). Muscle strengthening bar (1) according to Claim 4, characterized in that the first fixing means (4a) is offset with respect to the third fixing means (8a), the second fixing means (4b) being offset with respect to the fourth attachment means (8b), the first attachment means (4a) and the second attachment means (4b) being mounted in rotation relative to the muscle strengthening bar (1) and around the central axis (12) , the third attachment means (8a) and the fourth attachment means (8b) being fixedly mounted on the muscle strengthening bar (1). Muscle strengthening bar (1) according to any one of Claims 2 to 6, characterized in that the first fixing means (4a) is formed by a first orifice (16a) and the third fixing means (8a) is formed by a second orifice (17a), the first and second orifices (16a, 17a) being positioned on the same first cylindrical support (14a), the second fixing means (4b) being formed by a third orifice (16b) and the fourth fixing means (8b) being formed by a fourth orifice (17b), the third and fourth orifices (16b, 17b) being positioned on the same second cylindrical support (14b), each cylindrical support (14a, 14b) comprising a central orifice (15a, 15b) crossed by the muscle strengthening bar (1). Muscle strengthening bar (1) according to any one of Claims 1 to 7, characterized in that it comprises a first removable end (19a) and a second removable end (19b) removably fixed to the central gripping part (3) by first holding means (20). Muscle building bar (1) according to any one of Claims 1 to 8, characterized in that it comprises a first bar portion (21) fixed to a second bar portion (21') in a removable manner by second holding means (22). Muscle building assembly characterized in that it comprises a muscle building bar (1) as defined according to any one of claims 1 to 9, and at least one muscle building accessory mounted or fixed on the muscle building bar (1), the muscle building accessory comprising a first weight (7a) mounted on a first end (2a) of the muscle building bar (1) and a second weight (7b) mounted on a second end (2b) of the muscle strengthening bar (1) and/or at least one elastic rope (5a, 5b) fixed to the first fixing means (4a) and/or to the second fixing means (4b) and/or a first additional rope (9a) non-elastic fixed to the third fixing means (8a) and a second additional cord (9b) non-elastic fixed to the fourth fixing means (8b).