Assistance and resistance device for performing press-up exercises

Abstract

The present invention relates to an assistance and resistance device for performing press-ups, the device being configured to allow a user with differing levels of strength to perform press-ups using mechanisms to change foot height, adjust hand positioning, and modify the level of difficulty when performing press-ups. The assistance mechanisms consist of a board and the resistance mechanisms consist of motors and linear actuators, said mechanisms being controlled by a control module that allows the assistance or resistance, in addition to the level of difficulty of each one, to be selected.

Description

[0001] DEVICE FOR ASSISTANCE AND RESISTANCE IN PERFORMING PUSH-UP EXERCISES

[0002] TECHNICAL FIELD OF THE INVENTION

[0003] The present invention shows a device for assistance and resistance in performing push-ups, using mechanisms for changing the height of the feet, adjusting the positioning of the hands, an assistance mechanism using a plate, and support mechanisms using linear motors and actuators, controlled from a control module that allows the selection of assistance or support and the level of each.

[0004] BACKGROUND OF THE INVENTION

[0005] Push-ups, also known as plank exercises, are one of the most popular and effective exercises for strengthening the upper body, especially the pectoral, deltoid, and triceps muscles. This exercise, performed by lifting and lowering the body using the arms while maintaining a plank position, is valued for its simplicity and effectiveness. However, despite its simplicity, performing push-ups correctly can be challenging for many people, especially those just starting their fitness journey or who have physical limitations.

[0006] To help individuals perform push-ups more effectively and safely, various assistance and resistance devices have been developed. These devices are designed to provide support and guide body movement, ensuring proper form and preventing injuries. Some of these devices include push-up bars, ergonomic handles, and inclined platforms. Push-up bars, for example, elevate the user's hands, which can reduce strain on the wrists and allow for a greater range of motion. Ergonomic handles offer a more comfortable and stable grip, facilitating better alignment of the wrists, elbows, and shoulders.

[0007] In addition to assistive devices, there are also devices that add extra resistance to push-ups, increasing the difficulty of the exercise and promoting greater muscle development. These include resistance bands and weighted vests. Resistance bands are placed around the back and hands, creating additional resistance as the user pushes their body up. Weighted vests, on the other hand, add extra weight to the user's body, increasing the intensity of the exercise without changing the basic mechanics of the push-up.

[0008] Another important aspect in the development of push-up devices is the inclusion of smart technologies. Some modern devices incorporate sensors and mobile apps that monitor the user's form and performance, providing real-time feedback. These innovations allow users to instantly correct their technique and track their progress over time, which can be especially helpful for those training without the supervision of a personal trainer.

[0009] Devices for assisting and providing resistance during push-up exercises have evolved significantly, offering solutions for both beginners and advanced athletes. These devices not only improve the safety and effectiveness of the exercise but also allow for customization and increased training intensity according to individual needs. For this reason, a prior art search was conducted for devices for assisting and providing resistance during push-ups, which led to the discovery of United States Patent No. US 11229823 (Bl), published on January 25, 2022, entitled "MAXIMUM PUSH-UP EXERCISE MACHINE." This document describes a maximum push-up exercise machine for various prone push-up exercises on a platform with added resistance.One version of the device includes a cable and pulley weight system in a housing that is welded, bolted, or otherwise attached to the platform. The cable and pulley weight system can be configured in any way such that a cable thimble is positioned at the midpoint of the platform. The cable thimble is designed to connect to and receive a quick-link hook suspended from a harness or belt worn by the user, connect to a single cable handle attachment, and connect to a pull-up bar via a pull-up bar cable connector.

[0010] As we can see, the document cited above, as well as the many exercise machines that exist, both multifunctional and those that focus on specific exercises such as push-ups; none of these machines offer the ease of obtaining assistance and resistance in performing push-ups using mechanisms for changing the height of the feet and adjusting the positioning of the hands, as well as assistance mechanisms using a plate and support mechanisms using linear motors and actuators.

[0011] OBJECT OF THE INVENTION

[0012] The present invention aims to provide a device for assistance and resistance in performing push-ups, which allows a user of different strength levels to perform push-ups using a mechanism for changing foot height and adjusting hand positioning to modify the level of difficulty; assistance mechanisms by means of a board and support mechanisms by means of linear motors and actuators, controlled from a control module that allows the selection of assistance or support and the level of each, that is, it will allow the user to modify the resistance that the board will have when performing push-ups, allowing the user to modify if they require support to perform them or, for an advanced user, the resistance of the board can be increased when performing push-ups to increase the strength required to perform them.

[0013] BRIEF DESCRIPTION OF THE FIGURES

[0014] The characteristic details of this novel device for assistance and resistance in performing push-ups are clearly shown in the following description and accompanying figures, as well as an illustration thereof, using the same reference symbols to indicate the parts shown. However, these figures are shown by way of example and should not be considered limiting for the present invention. Figure 1 shows a right-side perspective view of the device for assistance and resistance in performing push-ups, with the user on the assistance plate and using the support structure.

[0015] Figure 2 shows a left perspective view of the device for assistance and resistance in performing push-ups.

[0016] Figure 3 shows a detailed left perspective view of the foot-lifting base with foot support of the device for assistance and resistance in performing push-ups.

[0017] Figure 4 shows a right-facing perspective view of the foot-lifting base with the foot support of the device for assisting and providing resistance during push-ups. Figure 5 shows a front-facing perspective view of the foot-lifting base of the device for assisting and providing resistance during push-ups, showing the movable supports. Figure 6 shows a rear-facing perspective view of the foot-lifting base of the device for assisting and providing resistance during push-ups, showing the cylindrical projection. Figure 7 shows a perspective view of the cavities in the foot-lifting base of the device for assisting and providing resistance during push-ups.

[0018] Figure 8 shows a detailed front perspective view of the foot support of the device for assistance and resistance in performing push-ups, with the integrated adjustment piece.

[0019] Figure 9 shows a detailed rear perspective view of the foot support of the device for assistance and resistance in performing push-ups, with the integrated adjustment piece, showing the supports with their slots.

[0020] Figure 10 shows a detailed front perspective view of the foot support of the device for assistance and resistance in performing push-ups.

[0021] Figure 11 shows a detailed front perspective view of the adjustment piece of the device for assistance and resistance in performing push-ups.

[0022] Figure 12 shows a detailed top perspective view of the support pillars of the device for assistance and resistance in performing push-ups, with the assistance plate.

[0023] Figure 13 shows a detailed view of the upper and lower rectangular perforations of one of the support pillars of the device for assistance and resistance during push-ups. Figure 14 shows a detail of the interior of one of the support pillars of the device for assistance and resistance during push-ups.

[0024] Figure 15 shows a detailed view of the support structure of the device for assistance and resistance in performing push-ups.

[0025] Figure 16 shows a detailed view of the cavities of the main structure of the device for assistance and resistance in performing push-ups.

[0026] Figure 17 shows a detailed view of the cavities of the main structure of the device for assistance and resistance in performing push-ups, with the hand holders.

[0027] Figure 18 shows a detailed perspective view of one of the hand grips of the device for assistance and resistance in performing push-ups.

[0028] Figure 19 shows a detailed bottom view of one of the hand grips of the device for assistance and resistance in performing push-ups.

[0029] DETAILED DESCRIPTION OF THE INVENTION

[0030] For a better understanding of the present invention, the parts that make up the device for assistance and resistance in performing push-ups, which is the subject of the present invention, are listed below:

[0031] 1. Main structure

[0032] 2. Foot lifting base

[0033] 3. Cavities

[0034] 4. Support pillar

[0035] 5. Foot support

[0036] 6. Adjustment piece 7. Support structure

[0037] 8. Attendance sheet

[0038] 9. Grip arc

[0039] 10. Mobile supports

[0040] 11. Rectangular projections

[0041] 12. Cylindrical fastener

[0042] 13. Foot stop

[0043] 14. Rounded pivots

[0044] 15. Circular perforations

[0045] 16. Supports

[0046] 17. Slots

[0047] 18. crevices

[0048] 19. Projections

[0049] 20. Cylindrical supports

[0050] 21. Upper rectangular bore 22. Lower rectangular bore 23. Resistance linear actuators 24. Assist linear actuators 25. Motor mount

[0051] 26. Engine

[0052] 27. Supports

[0053] 28. Upper support plate

[0054] 29. Slots

[0055] 30. Lower support plate

[0056] 31. Panel with buttons

[0057] 32. Panel with buttons

[0058] 33. Cavities

[0059] 34. Drilling

[0060] 35. Button

[0061] 36. Circular plate

[0062] 37. Cylindrical base

[0063] 38. Cylindrical pivots

[0064] 39. Cylindrical projection

[0065] 40. Rectangular projections

[0066] 41. Hand Support With reference to the figures, the device for assistance and resistance in performing push-ups, which is the subject of the present invention, consists of a rectangular main structure (1) as a base, which at its end has a flat rectangular projection as a foot elevation base (2) projecting perpendicularly from the main structure (1). A pair of cavities (3), which are preferably rectangular, are arranged vertically and parallel to each other on the front face of the foot elevation base (2).Inside the rectangular cavities (3) are located a plurality of rectangular plates in the form of movable supports (10), arranged horizontally, which are joined inside the foot-lifting base (2) to a cylindrical projection (39) located on the back face of the foot-lifting base (2); this configuration allows that when the cylindrical projection (39) is pulled, the movable supports (10) retract into the foot-lifting base (2) and disappear from it; an internal spring mechanism (not illustrated) is located inside the foot-lifting base (2) which is in contact with the cylindrical projection (39) which allows it to return to its original position when it stops being pulled, so that the movable supports (10) return to their initial position.On the front face of the foot lifting base (2) on the elongated edges of the rectangular cavities (3) rectangular projections (11) are shown covering a segment of the opening of the rectangular cavities (3), mounted within said cavities (3) and on the movable supports (10).

[0067] As shown in Figure 2, a foot support (5) has a rectangular L-shaped structure with a pair of rectangular protrusions (40) on its sides. Referring to Figures 8 to 11, a pair of square protrusions (16) are visible on the rear face of the foot support (5). These protrusions have grooves (17), preferably rectangular, at their ends attached to the foot support (5). These grooves fit into the rectangular protrusions (11), allowing the foot support (5) to be mounted on the movable supports (10) of the foot-lifting base (2). The retractable movement of the movable supports (10) allows the vertical position of the foot support (5) to be adjusted by changing its height relative to the main structure (1).

[0068] On the inner faces of the rectangular lateral projections (40) of the foot support (5), a rectangular indentation (18) can be seen, as can be seen in figure 10, within said indentation (18) a plurality of circular perforations (15) can be seen.

[0069] Mounted on the foot support (5) is an adjustment piece (6), which shows a rectangular L-shaped structure with a rounded corner at the junction of its vertical and horizontal sections. On the upper face of the horizontal section of the adjustment piece (6) is a pair of semicircular protrusions acting as foot stops (13), which allow the user's feet to remain in a stable position during the use of the device for assistance and resistance in performing push-ups.On the sides of the vertical section of the adjustment piece (6) there are a pair of square projections (19), which fit into the groove (18) of the inner faces of the rectangular projections (40) on the sides of the foot support (5); on the side of both square projections (19) there are rounded pivots (14) which fit into the circular perforations (15) on the inside of the groove (18) of the rectangular projections (40) on the sides of the foot support (5).On the upper face of the vertical section of the adjustment piece (6) a cylindrical fastener (12) is observed, which is joined to the rounded pivots (14) on the inside of the vertical section of the adjustment piece (6); these rounded pivots (14) have the ability to contract inside the projections (19) by pulling the cylindrical fastener (12) and with the contraction of the rounded pivots (14) the adjustment piece (6) can be moved forward or backward, placing it in the various positions indicated by the circular perforations (15) in the slot (18), thus allowing the adjustment piece (6) to be adapted according to the user.

[0070] A support pillar (4) is placed on each side of the main structure (1), with one support pillar (4) facing the other, both preferably positioned a quarter of the way from the end of the main structure (1) opposite the foot-lifting base (2). The support pillars (4) are hollow, vertically elongated rectangular structures. Both support pillars (4), as detailed in Figures 12 to 14, contain the assistance and resistance mechanisms for performing the exercise. On the inner side face facing the base (1) of the support pillars (4), a pair of rectangular perforations (21 and 22) are visible, arranged one above the other.Located at the top of the interior of each support pillar (4), to one side of the upper rectangular perforation (21), is a linear assist actuator (24), arranged so that its rod in the retracted position is located at the top of the lower rectangular perforation (22), so that when actuated and extended, it travels the length of said lower perforation. At the end of the rod of the linear assist actuator (24) is a support (27), preferably rectangular; On each support (27) of the linear assist actuators (24) of both support pillars (4) are assembled some axes of the side faces of an assist plate (8), which shows a flat piece in the shape of a "T", a shape that allows the user's torso to be placed and their arms to hang freely towards the main structure (1), as illustrated in figure 1.The assist plate (8) has the ability to rotate by means of the axes arranged on the sides and placed on the supports (27) of the linear assist actuators (24). This configuration allows users to be supported when exercising by providing support that helps them complete the exercise by means of the contraction of the linear assist actuators (24).

[0071] Inside each support pillar (4) and on one side of the lower rectangular perforation (22) is a linear resistance actuator (23), arranged so that its extended rod is located at the top of the upper rectangular perforation (21), so that when actuated and retracted it travels the length of said upper perforation (21). At the end of the rod of the linear resistance actuators (23) is a rectangular piece in the form of a motor support (25), on which a motor (26) is placed, which is joined by its shaft to a support (20) preferably cylindrical.

[0072] Each cylindrical support (20) is L-shaped, meaning that a first part projects horizontally from the support pillar (4) towards the middle of the main structure (1), then projects 90 degrees towards the front end of the main structure (1), and the end of each cylindrical support (20) descends towards the main structure (1). This arrangement ensures that the cylindrical supports (20) projecting from each support pillar (4) are symmetrically aligned with each other. Each end of each cylindrical support (20) has magnetic properties.

[0073] As illustrated in Figures 1, 2 and 15, the device for assistance and resistance in performing push-ups has a support structure (7) which is shaped like a garment and has reinforced fabric, which is preferably a vest that the user puts on for the use of the device that is the subject of the present invention.The support structure (7) has on its back an upper support plate (28) arranged at the height of the user's upper back, said upper support plate (28) is rectangular in shape and has two slots (29) with magnetic properties which coincide in shape with the ends of each cylindrical support (20) descending towards the main structure (1), in such a way that each slot can be assembled with each end of cylindrical support (20), ensuring the position of the support structure (7) on the assist plate (8); the shape of the slots (29) and each end of each cylindrical support (20) descending towards the main structure (1) is preferably circular.

[0074] The support structure (7) has a lower support plate (30) on its rear, positioned at the user's lower back and aligned with the spine and lower torso. This lower support plate (30) is rectangular in shape. The configuration of the upper support plate (28) and the lower support plate (30) provides support to the user's back and forces the correct position of the user's back and buttocks during exercise.

[0075] The linear resistance actuators (23), the motors (26), the cylindrical supports (20) together with the support structure (7), provide resistance when performing the exercise by means of the movement of the linear resistance actuators (23) and the controlled rotation of the motors (26) which is transmitted to the cylindrical supports (20) and exert pressure on the upper support plate (28) in the support structure (7).

[0076] Both the linear resistance actuators (23) and the motor (26), and the linear assistance actuators (24), are controlled by means of a control module (not illustrated) located inside the main structure (1) that allows the selection of assistance or resistance, as well as the level of each. On the upper face of the main structure (1) and in front of the support pillars (4), as shown in figures 16 and 17, there is a panel with buttons (31 and 32), arranged one on each side of the upper face of the main structure (1); these panels with buttons (31 and 32) are configured so that one of them changes the intensity of the resistance or assistance of the device and the other switches between the assistance or resistance functions according to the user's requirements.The panels with buttons (31 and 32) connect to the control module (not illustrated) located inside the main structure (1).

[0077] On the upper face of the main structure (1), at the opposite end from where the foot-lifting base (2) is located, in front of the support pillars (4) and the button panels (31 and 32), as can be seen in Figures 16 and 17, there is a pair of U-shaped cavities (33), which have circular, countersunk holes (34) on their inner faces. Mounted inside each of the cavities (33) is a hand holder (41), as illustrated in Figures 18 and 19. Each hand holder (41) consists of three parts: a gripping arc (9), a circular plate (36), and a cylindrical base (37).arranged as follows, the circular plate (36) is attached to the lower part of the gripping arc (9) and displays a diameter greater than the width of the cavities (33), attached below the circular plate (36) and arranged concentrically is the cylindrical base (37) which is smaller than the circular plate (36);On the periphery of the cylindrical base (37) there is a plurality of cylindrical pivots (38), which are the same size as the stopped holes (34), and have the characteristic of retracting when a button (35) located on the front face of one of the vertical sections of the gripping arc (9) is pressed or actuated by the user, thus allowing the position of the hand grips (41) to be changed both along the cavities (33) and rotationally about their own axis. The hand grips (41) are secured inside the cavities (33) when the cylindrical pivots (38) of the cylindrical base (37) are inserted into the holes (34) inside the cavities (33), thus allowing the desired hand positioning for the exercise to be performed.

[0078] The control module consists of a microcontroller and a power supply that enable the operation and functioning of the various electrical and electronic elements.

[0079] In view of the foregoing, it is reiterated that the scope of the present invention shall not be limited by the specific embodiments described, and it shall be understood that variations may be made in several respects. Such variations shall not be considered a departure from the spirit and scope of the invention, and all such modifications may be obvious to a person skilled in the art and shall be included within the scope of the following claims.

Claims

CLAIMS 1. A device for assistance and resistance in performing push-ups, characterized in that it comprises: a rectangular main structure (1) as a base, which at its end has a flat rectangular projection as a foot-raising base (2); a pair of cavities (3) are arranged vertically and parallel to each other on the front face of the foot-raising base (2); a plurality of rectangular plates as movable supports (10) are located inside each cavity (3), which are joined inside the foot-raising base (2) to a cylindrical projection (39) located on the foot-raising base (2);a foot support (5) which is a rectangular L-shaped structure with a pair of rectangular projections (40) on its sides; on the back face of the foot support (5) there are a pair of square projections acting as supports (16) by means of which said foot support (5) is mounted on the movable supports (10) of the foot lifting base (2); mounted on the foot support (5) there is an adjustment piece (6), which is a rectangular L-shaped structure with a rounding at the junction of its vertical and horizontal section; a support pillar (4) is placed on each side of the main structure (1), with one support pillar (4) facing the other; on the inner side face facing the base (1) of the support pillars (4) there is a pair of rectangular perforations (21 and 22), arranged one above the other;an assist linear actuator (24) is placed on the top inside of each support pillar (4), to one side of the upper rectangular perforation (21); at the end of the rod of the assist linear actuator (24) a support (27), preferably rectangular, is visible; on each support (27) of the assist linear actuators (24) of both support pillars (4) axes of the side faces of an assist plate (8) are assembled; a resistance linear actuator (23) is placed inside; each support pillar (4) and one side of the lower rectangular perforation (22); a motor support (25) is placed at the end of the rod of the linear resistance actuators (23), on said motor support (25) a motor (26) is placed, which is joined by its shaft to a support (20); a support structure (7) has on its rear an upper support plate (28) arranged at the height of the user's upper back, said upper support plate (28) is rectangular in shape and has two slots (29) with magnetic properties which coincide in shape with the ends of each support (20), in such a way that each slot can be assembled with each end of cylindrical support (20), ensuring the position of the support structure (7) on the assist plate (8); A lower support plate (30) is arranged at the rear of the support structure (7);A control module consisting of a microcontroller and a power supply located inside the main structure (1) enables the operation and functioning of the device; a panel with buttons (31 and 32) are arranged on the upper face of the main structure (1) in front of the support pillars (4) and are connected to the control module, configured to change the intensity of the resistance or assistance of the device, and the other toggles between the assistance or resistance functions as required; a pair of cavities (33) are located on the upper face of the main structure (1) at the opposite end from where the foot-lifting base (2) is located, said cavities (33) have holes (34) on their inner faces; and a hand holder (41) is mounted inside each of the cavities (33).

2. The device according to claim 1, further characterized in that the foot-lifting base (2) is projected perpendicularly from the main structure (1).

3. The device according to claim 1, further characterized in that the cavities are rectangular.

4. The device according to claim 1 further characterized in that the movable supports (10) are arranged horizontally within the cavities (3).

5. The device according to claim 1 further characterized in that the cylindrical projection (39) is located on the rear face of the foot lifting base (2), and allows the movable supports (10) to retract into the foot lifting base (2) when said cylindrical projection (39) is pulled out, thus concealing them from it.

6. The device according to claim 1 further characterized in that an internal spring mechanism is located inside the foot lifting base (2) which is in contact with the cylindrical projection (39) which allows it to return to its original position when it stops being pulled, such that the movable supports (10) return to their initial position.

7. The device according to claim 1 further characterized in that, on the front face of the foot-lifting base (2), on the elongated edges of the rectangular cavities (3), rectangular projections (11) are shown covering a segment of the opening of the rectangular cavities (3), mounted within said cavities (3) and on the movable supports (10).

8. The device according to claim 1 further characterized in that the supports (16) of the foot support (5) have rectangular grooves (17) at their end attached to the foot support (5), which fit into the rectangular projections (11).

9. The device according to claims 1 and 7 further characterized in that the retractable movement of the movable supports (10) allows the vertical position of the foot support (5) to be adjusted by changing its height with respect to the main structure (1).

10. The device according to claim 1 further characterized in that, on the inner faces of the projections rectangular ( 40 ) sides of the foot support ( 5 ) , a rectangular slit ( 18 ) is observed, within which a plurality of circular perforations ( 15 ) are observed.

11. The device according to claim 1 further characterized in that, on the upper face of the horizontal section of the adjustment piece (6), there is a pair of semicircular projections as a foot stop (13), which allow the user's feet to remain in a stable position during the use of the device for assistance and resistance in performing push-ups.

12. The device according to claims 1 and 9 further characterized in that, on the sides of the vertical section of the adjustment piece (6), a pair of square projections (19) are observed, which fit into the groove (18) of the inner faces of the rectangular projections (40) lateral to the foot support (5); on the side of both square projections (19), rounded pivots (14) are observed which fit into the circular perforations (15) inside the groove (18) of the rectangular projections (40) lateral to the foot support (5).

13. The device according to claims 1 and 12 further characterized in that, on the upper face of the vertical section of the fitting piece (6), a cylindrical fastener (12) is observed, which is attached to the rounded pivots (14) inside the vertical section of the fitting piece (6); said rounded pivots (14) have the ability to contract into the interior of the projections (19) by pulling the cylindrical fastener (12), and with the contraction of the rounded pivots (14), the fitting piece (6) can be moved into the various positions indicated by the circular perforations (15) in the slot (18), thus allowing the fitting piece (6) to be adapted.

14. The device according to claim 1 further characterized in that the support pillars (4) are hollow rectangular structures elongated vertically; These pillars are arranged a quarter of the way before reaching the end of the main structure (1) opposite where the foot-lifting base (2) is located.

15. The device according to claim 1 further characterized in that the linear assist actuator (24) is arranged in such a way that its rod in the retracted position is located at the top of the lower rectangular perforations (22), so that, when actuated and extended, it travels the length of said lower perforation.

16. The device according to claim 1 further characterized in that the linear resistance actuator (23) is arranged in such a way that its rod in the extended position is located in the upper part of the upper rectangular perforations (21), so that when actuated and retracted it travels the length of said upper perforation (21).

17. The device according to claim 1 further characterized in that the assistance plate (8) is a flat, T-shaped piece and has the ability to rotate by means of the axes arranged on the sides and placed on the supports (27) of the linear assistance actuators (24). This configuration allows users to be supported when exercising by providing support that helps them complete the exercise by means of the contraction of the linear assistance actuators (24).

18. The device according to claim 1 further characterized in that each support (20) is cylindrical and has an "L" shape, a first part projecting horizontally from the support pillar (4) towards the middle of the main structure (1), subsequently projecting 90 degrees towards the front end of the main structure (1), and the end of each cylindrical support (20) descends towards the main structure (1); ensuring that the cylindrical supports (20) projecting from each support pillar (4) are symmetrically aligned with each other.

19. The device according to claim 18 further characterized in that each end of each cylindrical support (20) has magnetic properties.

20. The device according to claim 1 further characterized in that the support structure (7) is shaped like a garment and has reinforced fabric.

21. The device according to the preceding claim is further characterized in that the garment is a vest that the user puts on for the use of the device that is the subject of the present invention.

22. The device according to claims 1 and 18 further characterized in that the shape of the grooves (29) and each end of each cylindrical support (20) descending towards the main structure (1) is circular.

23. The device according to claim 1 further characterized in that the lower support plate (30) has a rectangular shape and is arranged at the height of the user's lower back aligned with the spine and the lower part of the torso.

24. The device according to claim 1 further characterized in that the upper support plate (28) and the lower support plate (30) provide support to the user's back and force the correct position of the user's back and buttocks when performing the exercise.

25. The device according to claim 1 further characterized in that the linear resistance actuators (23), the motors (26), the cylindrical supports (20) together with the support structure (7), provide resistance when performing the exercise by means of the movement of the linear resistance actuators (23) and the controlled rotation of the motors (26) which is transmitted to the cylindrical supports (20) and exert pressure on the upper support plate (28) in the support structure (7).

26. The device according to claim 1 further characterized in that the cavities (33) are in front of the support pillars (4) and the panels with buttons (31 and 32); said cavities (33) are U-shaped.

27. The device according to claim 1 further characterized in that the holes (34) are circular and stopped.

28. The device according to claim 1 further characterized in that each hand holder (41) comprises: a gripping arc (9), a circular plate (36), and a cylindrical base (37); wherein the circular plate (36) is attached to the lower part of the gripping arc (9) and has a diameter greater than the width of the cavities (33), attached below the circular plate (36) and arranged concentrically is the cylindrical base (37), which is smaller than the circular plate (36);On the periphery of the cylindrical base (37) there is a plurality of cylindrical pivots (38), which have the characteristic of retracting when a button (35) located on the front face of one of the vertical sections of the gripping arc (9) is pressed or actuated by the user, thus allowing the position of the hand grippers (41) to be changed both along the cavities (33) and rotationally on their own axis.

29. The device according to claim 28 further characterized in that the cylindrical pivots (38) are of the same size as the stopped holes (34).

30. The device according to claim 28 further characterized in that the hand holders (41) are secured inside the cavities (33) when the cylindrical pivots (38) of the cylindrical base (37) are inserted into the holes (34) inside the cavities (33), thus allowing the desired hand positioning for the exercise to be performed.

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