Two-hand portable wrist exercise apparatus

Abstract

A two-hand portable wrist exercise apparatus (1), comprising; -a frame (3), - first and second exercise elements (3a, 3b) each comprising a rotatable elements (31), wherein the a rotatable elements (31) are configured to be individually rotationally operated by a right and a left hand of a user, wherein the first and second exercise elements (3a, 3b) are arranged in the first and second ends of the frame (2a, 2b), respectively, and first and second counter torque elements is configured to provide counter torques in respective opposite rotational directions of the rotatable elements (31), wherein the counter torques in the respective opposite rotational directions are independent of each other.

Description

TWO-HAND PORTABLE WRIST EXERCISE APPARATUSTECHNICAL FIELD

[0001] The invention relates to a wrist exercise apparatus with multiple applications, such as for wrist recovery and general wrist training in order to prevent injuries and build forearm strength.BACKGROUND

[0002] The forearm contains several muscles, tendons and ligaments that may be located immediate, superficial or deep in the arm. There might be many reasons for muscle related pain in the forearm, such as overuse or injury. While exercises as treatment should be performed only after medical consultations, exercises are considered an important part of rehabilitation. Such exercises may include wrist rotations and wrist extensions.

[0003] Later stages of rehabilitation may include the use of relevant equipment, such as cable machines and curl bars, to prevent forearm pain from reoccurring. While such training is used in rehabilitation, it is equally important as a means for general injury prevention, especially for people performing repetitive tasks, such as those working mostly with a keyboard and mouse.

[0004] Forearm and wrist strength is also important for most types of sport activities, such as e.g., golf, tennis, volleyball, wrestling and weightlifting to mention a few. Strengthening the wrists and the forearms is important to increase grip strength to improve general performance in the relevant sports discipline. One such example is weightlifting, where it might seem like most of the focus is on the larger muscle. However, without the necessary stability and mobility from a strong grip, improvements are difficult. Within such sports there are also a lot of injuries, and wrist exercises may be a good way of preventing strains and injuries.

[0005] Wrist extension exercises are well known. One way to perform the exercise is to lean the forearm with a weight, such as a dumbbell, in the hand on a table, let the wrist hang off the end of the table with the palm down and repeatedly rising and lowering the weight by bending the wrist, to do wrist extensions. Wrist curls can be performed by turning the arm to a position where the palm is up.

[0006] A number of single hand wrist strength trainer devices exist, wherein the hand is inserted into some sort of flexible frame and a grip for holding. When holding the grip and rotating the wrist, the flexible frame sets up a counterforce that requires a certain torqueto be overcome to rotate the wrist. Some of these trainers have an adjustable counterforce.

[0007] CN104107530A discloses a multifunctional wrist trainer formed as a stick with two handles, where the two handles are fixed to an elastic member in the center shaft rod. The two handles are twisted in relative opposite directions, and the elastic member produces counter torsion.

[0008] USUS11504572B2 discloses a Z-bar or a curl bar with rotatable handles to prevent wrist injuries when exercising.

[0009] FR2770784 Al describes muscle exercise machines with bi-directional torque.

[0010] US5766112A discloses a portable wrist exercise apparatus where handles rotate about the same axis and opposite wrist torques are used to operate the apparatus.

[0011] US2006166797A1, US5454769A and GB2585949A describe alternative exercise machines.

[0012] While the above devices and methods may work as alternatives for wrist training, it is difficult to isolate the muscles in the forearms with dedicated wrist exercises.SHORT SUMMARY

[0013] A goal with the present invention is to overcome the problems of prior art, and to disclose a wrist trainer with improved properties.

[0014] The invention solving the above-mentioned problems is a two-hand portable wrist exercise apparatus according to the independent claims.

[0015] The two-hand portable wrist exercise apparatus of the invention may have one or more of the following advantages over prior art:

[0016] Improved ergonomics and training effect.

[0017] Targeted training of different muscle groups in isolation.

[0018] The apparatus allows different training exercises, such as wrist flexion and extension exercises.

[0019] A large range of easily settable counter torques.

[0020] The number of components required for production is low. Production time and cost may therefore be reduced.

[0021] The apparatus is easy to carry.BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Fig. 1 illustrates a two-hand portable wrist exercise apparatusl, according to an embodiment of the invention where first and second exercise tools 20a, 20b have been placed into first and second tool interfaces on one side of the exercise apparatus.

[0023] Fig. 2 illustrates in a sketch how the exercise apparatus can be operated. The exercise apparatus is placed on the lap of a sitting person with the first and second exercise tools 20a, 20b in position for the left and right hand, respectively.

[0024] Fig. 3 illustrates in an embodiment the two-hand portable wrist exercise apparatus 1, where only the second, or lower, housing element 10b is shown.

[0025] Fig. 4 illustrates in an embodiment as in Fig. 3, the two-hand portable wrist exercise apparatus 1, where all housing elements have been removed. The first and second housing elements 10a, 10b, may be replaceably attached to the frame 3 with magnets.

[0026] Fig. 5 illustrates in an exploded view an embodiment the first exercise element 3a, which may be identical to the second exercise element 3b.

[0027] Fig. 6 illustrates in a view perpendicular to the rotational axis of the rotatable element 31, details of the first rotatable element 31a.

[0028] Fig. 7 illustrates in a view in the direction of the rotational axis of the rotatable element 31 details of the first rotatable element 31a.

[0029] Fig. 8 illustrate a two-hand portable wrist exercise apparatus 1 with exercise tools placed in the tool interfaces.

[0030] Fig. 9 illustrate a two-hand portable wrist exercise apparatus 1 with two different types of exercise tools removed from the first and second tool interfaces 40a, 40b.EMBODIMENTS OF THE INVENTION

[0031] In the following description, various examples and embodiments of the invention are set forth in order to provide the skilled person with a more thorough understanding of the invention. The specific details described in the context of the various embodiments and with reference to the attached drawings are not intended to be construed as limitations. Rather, the scope of the invention is defined in the appended claims.

[0032] The embodiments described below are numbered. In addition, dependent embodiments defined in relation to the numbered embodiments are described. Unless otherwise specified, any embodiment that can be combined with one or more numbered embodiments may also be combined directly with any of the dependent embodiments of the numbered embodiments referred to.

[0033] In an independent embodiment EMI, the portable two-hand wrist exercise apparatus 1, comprises;-a frame 3,- first and second exercise elements 3a, 3b each comprising a rotatable element 31, wherein the rotatable elements 31 are configured to be individually rotationally operated by a right and a left hand of a user, respectively, wherein the first and second exercise elements 3a, 3b are arranged in the first and second ends 2a, 2b, of the frame 3respectively, and- first and second counter torque elements configured to provide counter torques in respective opposite rotational directions of the rotatable elements 31, wherein the counter torques in the respective opposite rotational directions are independent of each other.

[0034] In a dependent embodiment EM2 of EM 1, the first exercise element 3a wherein; the rotatable element 31 is configured to rotate about a rotational axis L perpendicular to a longitudinal direction of the frame 3.

[0035] In a dependent embodiment EM3 of EMI or EM2 the first counter torque element has first and second ends, wherein the first end is connected to the rotatable element 31 of the first exercise element 3a, and wherein the first counter torque element is configured to provide the counter torque of the rotatable element 31 of the first exercise element 3a.

[0036] In a dependent embodiment EM4 of any of EMI to EM3, the first and second exercise elements 3a, 3b are identical. I.e., the second counter torque element has first and second ends, wherein the first end is connected to the rotatable element 31 of the second exercise element 3b, and wherein the first counter torque element is configured to provide the counter torque of the rotatable element 31 of the second exercise element 3b.

[0037] In a dependent embodiment EM5 of any of EMI to EM4, the two-hand wrist exercise apparatus 1 comprises a counter torque shift mechanism, allowing selection between two or more different counter torques for the rotatable element 31 of the first exercise element 3a.

[0038] In a dependent embodiment EM6 of EM5, the counter torque shift mechanism comprises a first counter torque shift mechanism connected to the first end of the first counter torque element.

[0039] In a dependent embodiment EM7 of EM6, the rotatable element 31 comprises two or more selection positions 51a, 51b,... configured to selectably hold a first end of the first counter torque element.

[0040] In a dependent embodiment EM8 of EM7, the two or more selection positions 51a, 51b,... are arranged on different radii from a rotational axis L of the rotatable element 31.

[0041] In a dependent embodiment EM9 of any of EM7 to EM8, the two or more selection positions 51a, 51b,... are arranged on different longitudinal positions in the direction of the rotational axis L.

[0042] In a dependent embodiment EM10 of any of EM7 to EM9, the two-hand wrist exercise apparatus comprises an element guide 53a, 53b, ... for each of said selection positions 51a, 51b,.... The element guides may be part of the rotatable element 31.

[0043] In a dependent embodiment EMU of EM10 the element guide 53a, 53b, ... has a groove for the counter torque element.

[0044] In a dependent embodiment EM12 of any of EM10 or EM11, the element guide 53a, 53b, ... has the shape of a half-circle in a view in the direction of the rotational axis.

[0045] In a dependent embodiment EM14 of any of EM11 or EM12, the distance of the groove from the rotational axis decreases with the distance from the corresponding selection position 51a, 51b,...

[0046] In a dependent embodiment EM15 of any of EM7 to EM13, a set of element guides 53a, 53b, ... comprising the element guides corresponding to each of the two or more corresponding selection position 51a, 51b,.. are stacked in the longitudinal direction of the rotational axis L.

[0047] In a dependent embodiment EM16 of any of EM6 to EM15, the two-hand wrist exercise apparatus comprises a second counter torque shift mechanism, allowing selection between two or more different counter torques for the first exercise element 3a.

[0048] In a dependent embodiment EM17 of any of EM16, the frame 3 comprises two or more longitudinally separated first element holders 6a, each configured to hold a second end of the first counter torque element, allowing selection between two or more different counter torques for the rotatable element 31 of the first exercise element 3a.

[0049] In a dependent embodiment EM18 of EM17, the two-hand wrist exercise apparatus, comprises a first frame retainer 5a configured to hold the second end of the first elastic element 4a and to be releasably fixed to one of the two or more longitudinally separated first element holders 6a.In a dependent embodiment EM19 of any of EM3 to EM18, the first counter torque element comprises a longitudinal first elastic element 4a configured to store mechanical energy when stretched.

[0050] In a dependent embodiment EM20 of EM 19, the first elastic element 4a is a longitudinal latex band or tubing, such as e.g., a speargun tubing.

[0051] In a dependent embodiment EM21 of any of EM3 to EM20, the two-hand wrist exercise apparatus 1 comprises a pulley 33, wherein the first counter torque element is passing over the pulley.

[0052] In a dependent embodiment EM22 of EM21, the pulley 33 is rotatably arranged about a rotational axis L of the second exercise element 3b.

[0053] In a dependent embodiment EM23 of any of EM3 to EM22, the counter torque element comprises a torsion element configured to store mechanical energy when twisted, such as a helix or spiral spring.

[0054] In a dependent embodiment EM24 of any of EM19 to EM23, the counter torque element comprises a first inelastic string interconnected with the first elastic element 4a or the torsion element in a first joint 8a.

[0055] In a dependent embodiment EM25 of EM24, the first counter torque element comprises in its first end a first adjustment grip 9a, wherein first counter torque shift mechanism is configured to allow shifting between selection positions 51a, 51b,... when an external force opposite the counter torque is applied to the first adjustment grip 9a.

[0056] In a dependent embodiment EM26 of EM25, the first counter torque element comprises a first hold element 52a adjacent to the first adjustment grip 9a, wherein the first hold element is configured to maintain the first end of the first counter torque element with stored mechanical energy in its currently selected selection position 51a, 51b,... when the external force is missing.

[0057] In a dependent embodiment EM27 of any of EMI to EM26, the first exercise element 3a has first a first tool interface 40a configured to hold a replaceable exercise tool rotationally fixed with regards to the rotatable element 31.

[0058] In a dependent embodiment EM28 of EM27, the first exercise element 3a has a second tool interface 40b configured to hold a replaceable exercise tool rotationally fixed with regards to the rotatable element 31, wherein the second tool interface 40b is facing in an opposite direction with regards to the first tool interface 40b.

[0059] In a dependent embodiment EM29 of any of EMI to EM28, the first and second exercise elements 3a, 3b are mounted in the frame 3 upside-down with respect to each other.

[0060] In a dependent embodiment EM30 of any of EMI to EM29, the second exercise element 3b is rotated 180 degrees about its rotational axis L with respect to the first exercise element 3a.

[0061] In a dependent embodiment EM31 of any of EMI to EM230, the second exercise element 3b is rotated 180 degrees about its rotational axis L with respect to the first exercise element 3a.

[0062] In a dependent embodiment EM32, any of the elements of the second exercise element 3b is identical to corresponding elements of the first exercise element 3a in any of EMI to EM231.

[0063] In a dependent embodiment EM33, the counter torque shift mechanism comprises a second counter torque shift mechanism identical to the first counter torque shift mechanism of any of EM5 to EM18.

[0064] In a dependent embodiment EM34 of EM3, the two-hand wrist exercise apparatus comprises a second counter torque element with first and second ends, wherein the first end is connected to the rotatable element 31 of the second exercise element 3b, and wherein the counter torque element is configured to provide the counter torque of the rotatable element 31 of the second exercise element 3b.

[0065] In a dependent embodiment EM35 of any of EMI to EM32, the counter torques in the respective opposite directions are independent of each other.

[0066] In a dependent embodiment EM36 of any of EMI to EM35, the rotatable elements 31 of the first and second exercise elements 3a, 3b are configured to rotate about respective parallel, non-concentric first and second rotational axes ra, rb perpendicular to the longitudinal direction If of the frame 3.

[0067] In a dependent embodiment EM37 of any of EMI to EM36, the rotatable elements 31 of the first and second exercise elements 3a, 3b are configured to rotate from respective start positions paO, pbO.

[0068] In a dependent embodiment EM38 of EM37, the first and second counter torque elements are configured to return the rotatable elements 31 of the first and second exercise elements 3a, 3b back to the start positions paO, pbO. The exercise elements will then return to the start positions when external torques from the user in the opposite rotational direction is smaller than the torques from the first and second counter torque elements. In a dependent embodiment EM39 of EM37 or EM38, the first and second counter torque elements are configured to provide an initial counter torque when the rotatable elements 31 of the first and second exercise elements 3a, 3b are in the start positions paO, pbO.

[0069] In a dependent embodiment EM40 of EM39, the initial counter torques are settable by the counter torque shift mechanism.

[0070] In a dependent embodiment EM41 of any of EMI to EM40, the two-hand wrist exercise apparatus 1 is portable.

[0071] In a dependent embodiment EM42 of any of EMI to EM41, the two-hand wrist exercise apparatus 1 is configured to be arranged on a lap of a sitting person with the longitudinal direction of the frame 3 in a horizonal position across the lap.

[0072] In a dependent embodiment EM43 of any of EMI to EM42, the two-hand wrist exercise apparatus 1 is configured to be arranged on a lap of a sitting person with the longitudinal direction of the frame 3 in a horizonal position across the lap.

[0073] In a dependent embodiment EM44 of any of EMI to EM43, the rotatable elements 31 have tool interfaces in both ends, i.e., available on opposite sides of the housing 10, allowing exercise tools to be attached to the apparatus from both sides.

[0074] In a dependent embodiment EM45 of any of EMI to EM44, the two-hand wrist exercise apparatus 1 comprises a carrying handle arranged between the rotatable elements 31.

[0075] A specific independent embodiment will now be disclosed with reference to the attached drawings.

[0076] A two-hand wrist exercise apparatus 1 is illustrated in Fig. 1. A housing 10 and first and second exercise tools 20a, 20b can be seen, wherein each of the exercise tools is intended for training of the left and right arms, respectively, in this case. Fig. 2 illustrates how a person can arrange the wrist exercise apparatus on the lap, grip the handles of the first and second exercise tools and start training. The wrist exercise apparatus is herearranged to provide counter torques when the hands are rotated towards each other as indicated by the arrows in order to train wrist flexion.

[0077] Fig. 3 illustrates the embodiment in more detail. The housing 10 comprises first and second housing elements 10a, 10b. In this case the first housing element 10a has been removed, while the second housing element 10b remains visible in the back of the drawing.

[0078] Internally, the apparatus according to the embodiment comprises a frame 3 interconnecting first and second exercise elements 3a, 3b.

[0079] The first and second exercise elements 3a, 3b further comprises rotatable elements 31. The rotatable elements are configured for rotating about an axis perpendicular to the longitudinal direction of the frame 3.

[0080] The rotatable elements 31 both have first and second tool interfaces 40a, 40b for receiving and holding the first and second exercise tools shown in Fig. 1. In Fig. 3 only the first tool interface 40a for the first exercise element 3a is visible. Likewise, only the second tool interface 40b for the second exercise element 3b is visible form this view. However, it may be noted that the rotatable elements 31 have tool interfaces in both ends, i.e., available on opposite sides of the housing 10, allowing exercise tools to be attached to the apparatus from both sides.

[0081] The rotatable elements are connected to a torque selection system allowing setting of different counter torques according to the training exercise performed and the person carrying out the exercise. In this embodiment a first counter torque element comprises a first longitudinally elastic element 4a interconnected with a first string 7a in a first joint 8a. The end of the elastic element is connected to a first frame retainer 5a fixed to the frame 3 and the string end is connected to a torque retainer 50 arranged fixed to the rotatable element 31 a distance larger than zero from the rotational axis of the rotatable element.

[0082] In the specific embodiment illustrated, the first counter torque element is arranged from the first exercise element 3a, along the frame 3, over to the second exercise element 3b where it is supported by a pulley 33, and further changing direction towards the first exercise element. This allows among other advantages a longer operational length of the elastic element.

[0083] In this embodiment the first elastic element 4a comprises a folded, flat rubber band, where the first end is folded around the first frame retainer 5a, while the second endis fixed to a second end of a first string 7a in a first joint 8a. The first end of the first string 7a is fixedly attached to the torque retainer 50 of the first exercise element 3a.

[0084] The first exercise element 3a of Fig. 3 is now in an initial position where the first elastic element 3a in Fig. 3 has been stretched and providing a counter-torque to a rotation of the first trainer in the clockwise direction. In Fig. 3 the second counter torque element has not been mounted, but it is described below with reference to Fig.4.

[0085] Fig. 4 shows the dynamic behaviour more in detail. The first elastic element 4a is stretched and mounted as in Fig. 3. In addition, the second elastic element 4b is shown on the opposite side of the frame 3 with regards to the first elastic element 4a and the housing has been completely left out of the drawing. The second elastic element 4b is arranged from the second exercise element 3b arranged along the frame 3 on its far side (not visible), over to the first exercise element 3a where it is supported by a pulley 33, (not visible) and changing direction before it is joined with the second string 7b in the second joint 8b an continues towards the second exercise element 3b where the second string is fixed in the torque retainer 50.

[0086] In Fig. 4, a torque overcoming the counter torque from the second elastic element 4b has been applied to the second exercise element 3b, resulting in a rotation from an initial position to an extended position as illustrated by the curved stapled line. When the external torque on the second exercise element 3b is released, it will return to its initial position.

[0087] It can be seen from Fig. 4 that the counter torques set up on the first and second exercise elements 3a, 3b are completely independent from each other.

[0088] Fig. 5 shows, in an isometric exploded view, details of an embodiment of the first and second exercise elements 3a and 3b, Please note that these two elements are identical. When mounted in the frame 3, they are mounted 180 degrees rotated with respect to each other, as can also be seen in Fig. 4. This reduces the number of components drastically.

[0089] The exercise elements 3a and 3b, comprises a support element 30 with a frame mount 39 portion that is configured to extend into the ends of the frame 3. The support element has a cylindrical through hole configured to hold two spaced apart rotational bearings 35 supporting a tool axle 36. The tool axle 36 is in a first end rotationally and axially fixed to a first rotational element 31b and in the second end rotationally and axially fixed to a second rotational element 31b. The tool axle 36 has shaped ends configured to match correspondingly shaped bores or grooves in the first and second rotatable elements31a, 31b in order to keep the elements rotationally fixed. Furthermore, the tool axle comprises internal threads in both ends for receiving hold screws 37 configured to keep the first and second rotational elements 31a, 31b axially fixed to the tool axle 36.

[0090] The above disclosed configuration ensures that the first and second tool interfaces 40a, 40b of each first or second exercise element 3a, 3b are always rotationally synchronized. Seen from the user or operators side, this has the advantage that the rotational direction of the counter torque can be reversed simply by rotating the exercise apparatus 1. E.g., if the exercise apparatus is arranged on the lap as shown in Fig. 2 where counter torque opposes wrist flexion movement, the exercise apparatus can simply be turned up-side down without the need for the operator to stand up or do any other changes than to place the same or another set of first and second exercise tools into the first and second tool interfaces on the opposite side to do wrist extensions.

[0091] In addition to the elements described above, Fig. 4 also shows a pulley 33 that is rotationally arranged about the second rotatable element 31b. A rotatable bearing 34 is arranged radially between the second rotatable element 31b and the pulley 33 to ensure little rotational friction when longitudinal stretch of the first or second elastic element 4a, 4b rotates the pulley 33.

[0092] In Fig. 6 and Fig. 7 the first rotatable element 31a is illustrated in more detail. The view in Fig. 6 is seen from the second rotatable element 31b of the opposite exercise element 3a or 3b. The torque retainer 50 has the form of a groove in a radial extension of the first rotatable element 31a. The groove is formed as an open or inverse comb with multiple selection positions 51a, 51b, 51c.., wherein each position represents a possible counter torque.

[0093] The first end of the first or second string 7a, 7b is arranged through the torque retainer 50 and terminates on the opposite side in a first or second adjustment grip 9a, 9b, respectively in the form of a loop or noose, as seen in Fig. 7. A respective first or second hold element 52a, 52b fixed to the string close to the first or second adjustment grip 9a, 9b, with a diameter larger than the grooves of the retainer positions, ensures that the string stays in place in the selected selection position 51a, 51b,... .

[0094] Fig. 6 and 7 also illustrate multiple element guides 53a, 53b,.... The element guides will maintain the string a radial distance from the rotational axis of the exercise element when the first rotatable element 31a is rotated. The element guides are formed as open grooves in the radial direction, and the radial distance of the groves decrease gradually from the torque retainer position in a half circle. The gradually decreasing radius ensures that the exercises are adapted to the relative strength of the wrists, with relativemore counter torque in the beginning of the exercise than in the end. The number of element guides matches the number of torque retainer positions.

[0095] Counter torque can be adjusted in two different ways. One way of adjusting the counter torque is to move the string to another torque retainer position 51a, 51b, 51c.. This will result in a different path for the string according to the element guide matching the selected retainer position. Selection is done by pulling the first or second adjustment grip 9a, 9b in the direction of the arrow in Fig. 7. The string is then free to move to another position where the adjustment grip is released.

[0096] The second way of changing counter torque is by moving the first or second frame retainer 5a, 5b in the longitudinal direction of the frame. This is best illustrated in Fig. 3, where the first frame retainer 5a is arranged in a first element holder 6a. By removing the first elastic element 4a, the first frame retainer can be moved to another first element holder to the left, as illustrated in Fig. 4, and after mounting, the first elastic element can be replaced on the frame retainer 5a. The first elastic element 4a has now been pretensioned more than in the previous position.

[0097] The pre-tensioning can be seen as selecting between low and high gear ranges of a gearbox, while radial positioning of the string by selecting a torque retainer position can be seen as selecting gear within one of the gear ranges. The movement of the frame retainer therefore may double the number of possible counter torques on the exercise element.

[0098] In the exemplary embodiments, various features and details are shown in combination. The fact that several features are described with respect to a particular example should not be construed as implying that those features by necessity have to be included together in all embodiments of the invention. Conversely, features that are described with reference to different embodiments should not be construed as mutually exclusive. As those with skill in the art will readily understand, embodiments that incorporate any subset of features described herein and that are not expressly interdependent have been contemplated by the inventor and are part of the intended disclosure. However, explicit description of all such embodiments would not contribute to the understanding of the principles of the invention, and consequently some permutations of features have been omitted for the sake of simplicity or brevity.

Claims

CLAIMS1. A two-hand portable wrist exercise apparatus (1), comprising;-a frame (3),- first and second exercise elements (3a, 3b) each comprising a rotatable element (31), wherein the rotatable elements (31) are configured to be individually rotationally operated by a right and a left hand of a user, respectively, wherein the first and second exercise elements (3a, 3b) are arranged in the first and second ends (2a, 2b), of the frame (3), respectively, and- first and second counter torque elements configured to provide counter torques in respective opposite rotational directions of the rotatable elements (31), wherein the counter torques in the respective opposite rotational directions are independent of each other.

2. The two-hand portable wrist exercise apparatus (1) of claim 1, wherein the rotatable element (31) is configured to rotate about a rotational axis L perpendicular to a longitudinal direction of the frame (3).

3. The two-hand portable wrist exercise apparatus (1) of claim 1 or 2, wherein;- the first counter torque element has first and second ends, wherein the first end is connected to the rotatable element (31) of the first exercise element (3a), and wherein the first counter torque element is configured to provide the counter torque of the rotatable element (31) of the first exercise element (3a).

4. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 3, comprising a counter torque shift mechanism, allowing selection between two or more different counter torques for the rotatable element (31) of the first exercise element (3a).

5. The two-hand portable wrist exercise apparatus (1) of any of claims 3 to 4, wherein the rotatable element (31) comprises two or more selection positions (51a, 51b,...) configured to selectably hold a first end of the first counter torque element.

6. The two-hand portable wrist exercise apparatus (1) of claim 5, wherein the two or more selection positions (51a, 51b,...) are arranged on different radial distances from a rotational axis (L) of the rotatable element (31).

7. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 6, wherein the two-hand portable wrist exercise apparatus comprises a second counter torque shift mechanism, allowing selection between two or more different counter torques for the first exercise element (3a).

8. The two-hand portable wrist exercise apparatus (1) of any of claims 3 to 7, wherein the first counter torque element comprises a longitudinal first elastic element (4a) between the first and second ends, configured to store mechanical energy when stretched.

9. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 8, wherein the first exercise element (3a) has first a first tool interface (40a) configured to hold a replaceable exercise tool rotationally fixed with regards to the rotatable element (31), and a second tool interface (40b) configured to hold a replaceable exercise tool rotationally fixed with regards to the rotatable element (31), wherein the second tool interface (40b) is facing in an opposite direction with regards to the first tool interface (40b)10. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 9, wherein the first and second exercise elements (3a, 3b) are identical.

11. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 10, wherein the first and second exercise elements 3a, 3b are mounted in the frame 3 upsidedown with respect to each other.

12. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 11, wherein the rotatable elements (31) of the first and second exercise elements (3a, 3b) are configured to rotate about respective parallel, non-concentric first and second rotational axes (ra, rb) perpendicular to the longitudinal direction (If) of the frame (3).

13. The two-hand portable wrist exercise apparatus (1) of any of claims 1 to 12, wherein the rotatable elements (31) of the first and second exercise elements (3a, 3b) are configured to rotate from respective start positions (paO, pbO).

14. The two-hand portable wrist exercise apparatus (1) of claim 13, wherein the first and second counter torque elements are configured to return the rotatable elements (31) of the first and second exercise elements (3a, 3b) back to the start positions (paO, pbO).

15. The two-hand portable wrist exercise apparatus (1) of claim 13 or 14, the first and second counter torque elements are configured to provide an initial counter torque when the rotatable elements (31) of the first and second exercise elements (3a, 3b) are in the start positions (paO, pbO).

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