Sprint Dumbbell

Abstract

The present invention provides a sprint dumbbell, including a dumbbell body and a filling component, wherein the dumbbell body is provided with at least one accommodating cavity, and the cavity wall of the accommodating cavity includes a first side wall; the filling component is located in the accommodating cavity, and the filling component includes a plurality of dispersedly arranged first filling pieces, and the filling component can hit the first side wall when the movement speed of the dumbbell body changes, wherein at least two of the first filling pieces can hit the first side wall. The impact force of the filling component of the present invention on the first side wall can simulate the force change caused by swinging a rope or hitting a target object, and at the same time, the user can obtain instant mechanical feedback and sound feedback, thereby increasing the functions of the dumbbell and making the usage of the dumbbell more diversified, without being restricted by venues and equipment, and a variety of fitness methods can be achieved by simply holding the sprint dumbbell, thereby improving the user experience.

Description

Technical Field

[0001] The invention belongs to the technical field of fitness equipment, and in particular relates to a sprint dumbbell. Background Art

[0002] With the increasing pressure of life, fitness has become a healthy and increasingly popular lifestyle. People often use fitness equipment to achieve better exercise results when exercising. Existing dumbbells are used to exercise human muscles with weights, and their functions are too single. Summary of the invention

[0003] The purpose of the present invention is to provide a sprint dumbbell, aiming to solve the technical problem that the dumbbells in the prior art have too single functions.

[0004] The present invention is achieved in that a sprint dumbbell comprises:

[0005] The dumbbell body is provided with at least one accommodating cavity, and the cavity wall of the accommodating cavity includes a first side wall;

[0006] A filling assembly is located in the accommodating cavity, and the filling assembly includes a plurality of dispersedly arranged first filling pieces. The filling assembly can hit the first side wall when the movement acceleration of the dumbbell body changes, wherein at least two of the first filling pieces can hit the first side wall.

[0007] In one embodiment, the filling assembly further includes at least one second filling piece, and the first filling piece and the second filling piece are in an attracted state as a whole, and when the filling assembly hits the first side wall, the first filling piece and the second filling piece can move relative to each other under the action of inertia.

[0008] In one embodiment, at least one of the first filling piece and the second filling piece is a magnetic piece, and the first filling piece and the second filling piece have a magnetic attraction state. The first filling piece and the second filling piece can be in the attraction state when the impact force received by the filling component when it hits the first side wall is less than the magnetic attraction force between the first filling piece and the second filling piece.

[0009] In one embodiment, the first filler and the second filler also have a separated state in which they are separated from each other, and the first filler and the second filler can be in the separated state when the impact force received by the filling component when it hits the first side wall is greater than the magnetic attraction between the first filler and the second filler.

[0010] In one embodiment, the cavity wall of the accommodating cavity also includes a second side wall, and the filling component can hit the first side wall when the dumbbell body moves along the swing axis, and hit the second side wall when it moves along the impact axis, the first filling piece and the second filling piece can be in the attracted state when the impact force received by the filling component when hitting the second side wall is less than the magnetic attraction force between the first filling piece and the second filling piece, and can be in the separated state when the impact force received by the filling component when hitting the second side wall is greater than the magnetic attraction force between the first filling piece and the second filling piece, and the swing axis and the impact axis are set at an angle.

[0011] In one embodiment, the cavity wall of the accommodating cavity further includes a third side wall arranged opposite to the first side wall and a fourth side wall arranged opposite to the second side wall, and the distance between the first side wall and the third side wall of at least one of the accommodating cavities is smaller than the distance between the second side wall and the fourth side wall.

[0012] In one embodiment, there are a plurality of the accommodating cavities, a plurality of the filling components, and one of the accommodating cavities is filled with one of the filling components.

[0013] In one embodiment, the sprint dumbbell further comprises a fitting connected to the wall of the accommodating cavity, wherein the fitting can soundproof and / or cushion the impact force of the filling component on the dumbbell body.

[0014] In one embodiment, the sprint dumbbell further includes a motion sensor disposed on the dumbbell body and used to collect motion parameters.

[0015] In one embodiment, the dumbbell body has a hand-held portion and a support portion connected to the hand-held portion, and the support portion is magnetic.

[0016] The technical effect of the present invention relative to the prior art is as follows: the sprint dumbbell is provided with a filling component in the accommodating chamber, so that when the user holds the dumbbell body to perform actions such as swinging and punching, the filling component can hit the first side wall under the action of inertia, and the impact force of the filling component on the first side wall can simulate the force change caused by swinging a rope or hitting a target object, while allowing the user to obtain instant mechanical feedback and sound feedback, thereby improving the user experience. At least two first filling pieces of the filling component can hit the first side wall, so that when different first filling pieces hit the first side wall at different times, the mechanical feedback obtained by the user is more hierarchical, so as to simulate the force change during exercise. It can be seen that the present invention increases the function of the dumbbell, making the use of the dumbbell more diversified, and is not limited by the venue and equipment. A variety of fitness methods can be achieved by just holding the sprint dumbbell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a three-dimensional structural diagram of a sprint dumbbell provided by an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Cutaway view of a sprint dumbbell.

[0020] Description of reference numerals:

[0021] 10. Dumbbell body; 101. Accommodation cavity; 1011. First side wall; 1012. Second side wall; 1013. Third side wall; 1014. Fourth side wall; 11. Hand-held part; 12. Support part; 20. Filling assembly; 21. First filling piece; 22. Second filling piece. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "front", "back", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figure 1 and Figure 2 The present invention provides a sprint dumbbell, including a dumbbell body 10 and a filling component 20.

[0028] See also Figure 2 The dumbbell body 10 is provided with at least one accommodating cavity 101, which can be of any shape, and the cavity wall of the accommodating cavity 101 includes a first side wall 1011. The dumbbell body 10 can be held by a user, or by other auxiliary objects, so that the user can perform weight-bearing exercises. The dumbbell body 10 can be made of metal material, or can be made of materials such as compounds, polymers, and the like, such as resin materials.

[0029] See also Figure 2, the filling component 20 is located in the accommodating cavity 101, that is, the accommodating cavity 101 is filled with the filling component 20, wherein the filling component 20 does not fill the accommodating cavity 101 completely, and the filling component 20 can move freely in the accommodating cavity 101. The filling component 20 includes a plurality of first filling pieces 21 arranged in a dispersed manner, and the filling component 20 can hit the first side wall 1011 when the movement speed of the dumbbell body 10 changes, wherein at least two first filling pieces 21 can hit the first side wall 1011. In this embodiment, the first filling piece 21 is a metal piece or a magnetic piece, such as steel sand. The first filling piece 21 can be a sphere, and the sizes of the first filling pieces 21 can be the same or the sizes of at least two first filling pieces 21 can be different. In other embodiments, the first filling piece 21 can also be a viscous piece, an object that can undergo elastic deformation or plastic deformation. The above-mentioned speed change can be an increase or decrease in the movement speed, or a change in the movement direction, etc. The above-mentioned movement that can cause speed change includes swinging, punching, etc. When the dumbbell body 10 accelerates, it can drive the filling component 20 to move synchronously. When the dumbbell body 10 decelerates or changes direction, the filling component 20 continues to move in the accommodating cavity 101 along the acceleration direction under the action of inertia until it hits the first side wall 1011. At least two first filling components 21 can hit the first side wall 1011, that is, the area of ​​the first side wall 1011 is at least greater than the maximum length of the two first filling components 21.

[0030] Rope swinging and boxing are common fitness methods. When swinging rope, people train their arms by swinging the standing rope up and down quickly. However, rope swinging requires rope preparation and occupies a large space. When boxing, people need to prepare sandbags and boxing gloves. Due to the limitations of the venue and equipment, people can only exercise in the gym, which has certain limitations and brings many inconveniences to the fitness process. The sprint dumbbell is provided with a filling component 20 in the accommodating chamber 101, so that when the user holds the dumbbell body 10 to perform actions such as swinging and punching, the filling component 20 can hit the first side wall 1011 under the action of inertia. The impact force of the filling component 20 on the first side wall 1011 can simulate the force change caused by the hand swinging rope or hitting the target object, and at the same time, the user can get instant mechanical feedback and sound feedback, which improves the user experience. At least two first filling pieces 21 of the filling component 20 can hit the first side wall 1011, so that when different first filling pieces 21 hit the first side wall 1011 at different times, the mechanical feedback obtained by the user is more hierarchical to simulate the force change during exercise. It can be seen that the present invention increases the functions of the dumbbells, making the usage of the dumbbells more diversified and not limited by venues and equipment. A variety of fitness methods can be achieved by simply holding the sprint dumbbells, thereby improving the user experience.

[0031] See also Figure 2In this embodiment, the accommodating cavity 101 is a quadrilateral, and the cavity wall of the accommodating cavity 101 further includes a second side wall 1012, a third side wall 1013 arranged opposite to the first side wall 1011, and a fourth side wall 1014 arranged opposite to the second side wall 1012, that is, the first side wall 1011, the second side wall 1012, the third side wall 1013, and the fourth side wall 1014 are collectively enclosed to form a quadrilateral, and when the user swings the sprint dumbbell, the filling component 20 can hit the first side wall 1011, the second side wall 1012, the third side wall 1013, or the fourth side wall 1014 according to the change of the motion acceleration. Optionally, the first side wall 1011, the second side wall 1012, the third side wall 1013, and the fourth side wall 1014 are collectively enclosed to form a quadrilateral, such as a rectangle or a square, so that the relative cavity walls of the accommodating cavity 101 are evenly stressed. In other embodiments, the accommodating cavity 101 may also be in an elliptical, polygonal or irregular shape.

[0032] See also Figure 2 , the filling assembly 20 further includes at least one second filling piece 22, and the first filling piece 21 and the second filling piece 22 are in an attracted state of being attracted as a whole. When the filling assembly 20 hits the first side wall 1011, the first filling piece 21 and the second filling piece 22 can move relative to each other under the action of inertia. When the first filling piece 21 and the second filling piece 22 are in the attracted state, the first filling piece 21 and the second filling piece 22 are combined into a whole, but since the first filling piece 21 and the second filling piece 22 are combined with independent and dispersed structures, when the filling assembly 20 hits the first side wall 1011, they can move relative to each other under the action of inertia. From the perspective of the filling assembly 20 as a whole, the filling assembly 20 undergoes a certain deformation. At this time, multiple first filling pieces 21 can hit the first side wall 1011 at different time points, thereby making the impact force have a certain hierarchy, so that the user can feel the force change, improve the user experience, and at the same time, this force change can buffer the impact force and reduce the risk of muscle strain of the user. The first filling member 21 and the second filling member 22 can be attracted together by magnetic force, electric force or other adsorption force.

[0033] In this embodiment, the first filler 21 and the second filler 22 are attracted by magnetic force, and the plurality of first fillers 21 are all attracted by magnetic force to the second filler 22. At least one of the first filler 21 and the second filler 22 is a magnetic member, and the other is a magnetic member or metal.

[0034] The first filling piece 21 and the second filling piece 22 have a magnetically attracted state, and the first filling piece 21 and the second filling piece 22 can be in the attracted state when the impact force received by the filling component 20 when it hits the first side wall 1011 is less than the magnetic attraction between the first filling piece 21 and the second filling piece 22. In this embodiment, the first filling piece 21 is a metal ball, and the second filling piece 22 is a permanent magnet. The plurality of first filling pieces 21 can be attracted to the second filling piece 22 under the magnetic attraction of the second filling piece 22. It can be understood that the impact force generated by the filling component 20 when the absolute value of the acceleration of the dumbbell body 10 is less than the preset value can be less than the magnetic attraction between the first filling piece 21 and the second filling piece 22, that is, when the speed of the dumbbell body 10 does not change much, the first filling piece 21 and the second filling piece 22 can still be in the attracted state even if they are hit, and the filling component 20 can only be deformed as a whole, or not deformed.

[0035] The first filling piece 21 and the second filling piece 22 also have a separation state in which they are separated from each other. The first filling piece 21 and the second filling piece 22 can be in a separation state when the impact force received by the filling assembly 20 when it hits the first side wall 1011 is greater than the magnetic attraction between the first filling piece 21 and the second filling piece 22. It can be understood that the impact force generated by the filling assembly 20 when the absolute value of the acceleration of the dumbbell body 10 is greater than the preset value can be greater than the magnetic attraction between the first filling piece 21 and the second filling piece 22. That is, when the speed of the dumbbell body 10 changes rapidly, the first filling piece 21 and the second filling piece 22 can be separated when they are hit. The above-mentioned separation can be a separation that is separated from the magnetic attraction or a separation that is not separated from the magnetic attraction. The above-mentioned preset value is related to the magnetic attraction between the first filling piece 21 and the second filling piece 22. The size of the preset value can be adjusted by replacing the second filling piece 22 with different magnetic attraction or the first filling piece 21 with different gravity. The user can replace the filling assembly 20 according to their own different training requirements.

[0036] The filling component 20 can hit the first side wall 1011 when the dumbbell body 10 moves along the swing axis, and hit the second side wall 1012 when it moves along the impact axis, that is, the line between the first side wall 1011 and the third side wall 1013 is parallel to the swing axis, and the line between the second side wall 1012 and the fourth side wall 1014 is parallel to the impact axis. The first filling piece 21 and the second filling piece 22 can be in an attracted state when the impact force received by the filling component 20 when hitting the second side wall 1012 is less than the magnetic attraction between the first filling piece 21 and the second filling piece 22, and can be in a separated state when the impact force received by the filling component 20 when hitting the second side wall 1012 is greater than the magnetic attraction between the first filling piece 21 and the second filling piece 22, and the swing axis and the impact axis are set at an angle. The principle of the filling component 20 hitting the second side wall 1012 is the same as the principle of hitting the first side wall 1011, which will not be repeated here.

[0037] In this embodiment, the extension direction of the forearm can be taken as the impact axis, and the direction perpendicular to the extension direction of the forearm can be taken as the swing axis. The following description will be given by taking the swing axis as the up-and-down direction and the impact axis as the front-and-back direction as an example.

[0038] When the user swings the dumbbell body 10 in the up and down direction, the filling component 20 can hit the first side wall 1011 and the third side wall 1013. Taking the impact on the first side wall 1011 as an example, when the user swings faster, the absolute value of the acceleration is also larger. When the absolute value of the acceleration is greater than the preset value, the impact force of the filling component 20 on the first side wall 1011 can be greater than the magnetic attraction between the first filling piece 21 and the second filling piece 22, and the first filling piece 21 and the second filling piece 22 can be switched to a separated state, that is, the filling component 20 is broken up, and multiple first filling pieces 21 can hit the first side wall 1011 at different time points. Due to the magnetic attraction between the first filling piece 21 and the second filling piece 22, even if the filling component 20 is in a separated state, the distance between the multiple first filling pieces 21 is also very small, and the impact is continuous, so that the user can get a fluid force experience. This exercise method can simulate the movement process of standing rope swinging without preparing a venue and ropes. Exercise can be performed at home. It is easy to use and the filling component 20 can be replaced according to different training requirements. This type of exercise can increase muscle recruitment and use fluidity to strengthen the stability of deep muscles.

[0039] When the user holds the dumbbell body 10 and punches forward, taking the second side wall 1012 before the fourth side wall 1014 as an example, the user stops moving the dumbbell body 10 temporarily after punching, and the filling component 20 can hit the second side wall 1012. Since the user's speed is relatively low when punching, the speed of the dumbbell body 10 does not change much when it stops moving, that is, the absolute value of the acceleration is also relatively small. If the absolute value is less than the preset value, the impact force of the filling component 20 on the second side wall 1012 can be less than the magnetic attraction between the first filling piece 21 and the second filling piece 22, so that the first filling piece 21 and the second filling piece 22 are always in an attracted state, that is, the first filling piece 21 is always a whole. When the filling component 20 hits the second side wall 1012, it is subjected to a short and violent impact force, so that the user gets the force experience of hitting the target object, which well simulates the force process during boxing. At the same time, the impact sound of the filling component 20 on the dumbbell body 10 can provide sound feedback to the user, thereby improving the user experience.

[0040] See also Figure 2 , wherein there may be multiple accommodating cavities 101, and there may also be multiple filling components 20, and one accommodating cavity 101 is filled with one filling component 20. Providing multiple accommodating cavities 101 and filling components 20 can enhance the impact effect, meet different needs of users, and improve user experience. In this embodiment, the dumbbell body 10 is provided with three accommodating cavities 101, and each accommodating cavity 101 is arranged at intervals, and there may be three filling components 20, and one accommodating cavity 101 is filled with one filling component 20.

[0041] Among them, the distance between the first side wall 1011 and the third side wall 1013 of at least one accommodating cavity 101 is smaller than the distance between the second side wall 1012 and the fourth side wall 1014. In other words, the up-down distance of at least one accommodating cavity 101 is smaller than its front-to-back distance, so that when the user swings the dumbbell body 10 up and down, the filling component 20 in the accommodating cavity 101 moves up and down, and when the impact force of the filling component 20 is greater than the magnetic attraction between the first filling piece 21 and the second filling piece 22, the scattered filling components 20 are not enough to be attracted as a whole again within a short distance, that is, they are not enough to switch to the attracted state again, so that the fluidity experience in the subsequent impact process is enhanced. When the user holds the dumbbell body 10 and punches, the filling group in the accommodating cavity 101 moves forward. When the impact force of the filling component 20 is less than the magnetic attraction between the first filling piece 21 and the second filling piece 22, the filling component 20 is in an attracted state during the movement in the accommodating cavity 101, thereby hitting the second side wall 1012 as a whole. The longer front-to-back distance provides the filling component 20 with a sufficient flying distance in the accommodating cavity 101, so that the user can get greater and stronger force feedback and sound feedback, thereby enhancing the user's instant experience.

[0042] In this embodiment, three accommodating chambers 101 are arranged in sequence along the swing axis, wherein the distance between the first side wall 1011 and the third side wall 1013 of the accommodating chambers 101 at both ends is smaller than the distance between the second side wall 1012 and the fourth side wall 1014, and the distance between the first side wall 1011 and the third side wall 1013 of the middle accommodating chamber 101 is larger than the distance between the second side wall 1012 and the fourth side wall 1014, so as to enhance the force feedback during swing training and the impact experience when punching.

[0043] See also Figure 1 and Figure 2 Specifically, the dumbbell body 10 has a hand-held portion 11 and a support portion 12 connected to the hand-held portion 11. The user can hold the hand-held portion 11 for exercise. The support portion 12 can be provided with a support surface so that the user can stably hold it against the support surface, such as holding the support surface against the ground to do push-ups. When exercising, the user can hold a sprint dumbbell in each hand. Preferably, the support portion 12 is magnetic. After the exercise, the two support portions 12 can be relatively attracted to each other for easy storage. The two sprint dumbbells can be symmetrically arranged, and the support portion 12 of one sprint dumbbell is magnetic and the other sprint dumbbell is made of metal material, or the support portions 12 of the two sprint dumbbells are both magnetic. In this embodiment, the hand-held portion 11 is in the shape of a grip rod and extends along the swing axis. The hand-held portion 11 is also provided with a non-slip surface for the user to hold, and its shape meets the ergonomic requirements of hand holding. Among them, the middle accommodating cavity 101 of the above three accommodating cavities 101 can be located in the hand-held portion 11.

[0044] Preferably, the sprint dumbbell also includes a fitting connected to the wall of the accommodating cavity 101, and the fitting covers the wall of the accommodating cavity 101. The fitting may be made of sound insulation material to isolate the impact sound, or may be made of shock-absorbing material to cushion the impact force of the filling component 20 on the dumbbell body 10. The fitting may also have both sound insulation and shock-absorbing functions.

[0045] To facilitate users to view training data, the sprint dumbbell also includes a motion sensor disposed on the dumbbell body 10 and used to collect motion parameters. During or after training, the user can collect the user's heart rate, number and speed of punches, number and speed of swings, calorie consumption, exercise duration and other exercise parameters through the motion sensor, so as to visualize the exercise intensity.

[0046] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for explaining the principles of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementations of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A sprint dumbbell, characterized in that: include: The dumbbell body is provided with at least one accommodating cavity, and the cavity wall of the accommodating cavity includes a first side wall; A filling component is located in the accommodating cavity, and the filling component includes a plurality of dispersedly arranged first filling pieces. The filling component can hit the first side wall when the movement speed of the dumbbell body changes, wherein at least two of the first filling pieces can hit the first side wall, and the first filling piece is a sphere; the filling component also includes at least one second filling piece, and the first filling piece and the second filling piece are in an attracted state as a whole, and when the filling component hits the first side wall, the first filling piece and the second filling piece can move relative to each other under the action of inertia.

2. The sprint dumbbell according to claim 1, characterized in that: At least one of the first filling piece and the second filling piece is a magnetic piece, and the first filling piece and the second filling piece have a magnetic attraction state. The first filling piece and the second filling piece can be in the attraction state when the impact force received by the filling component when it hits the first side wall is less than the magnetic attraction force between the first filling piece and the second filling piece.

3. The sprint dumbbell according to claim 2, characterized in that: The first filling piece and the second filling piece also have a separated state in which they are separated from each other. The first filling piece and the second filling piece can be in the separated state when the impact force received by the filling component when it hits the first side wall is greater than the magnetic attraction between the first filling piece and the second filling piece.

4. The sprint dumbbell according to claim 3, characterized in that: The cavity wall of the accommodating cavity also includes a second side wall. The filling component can hit the first side wall when the dumbbell body moves along the swing axis, and hit the second side wall when it moves along the impact axis. The first filling piece and the second filling piece can be in the attracted state when the impact force received by the filling component when hitting the second side wall is less than the magnetic attraction force between the first filling piece and the second filling piece, and can be in the separated state when the impact force received by the filling component when hitting the second side wall is greater than the magnetic attraction force between the first filling piece and the second filling piece. The swing axis and the impact axis are set at an angle.

5. The sprint dumbbell according to claim 4, characterized in that: The cavity wall of the accommodating cavity further includes a third side wall arranged opposite to the first side wall and a fourth side wall arranged opposite to the second side wall. The distance between the first side wall and the third side wall of at least one of the accommodating cavities is smaller than the distance between the second side wall and the fourth side wall.

6. The sprint dumbbell according to any one of claims 1 to 5, characterized in that: There are a plurality of the accommodating cavities, a plurality of the filling assemblies, and one of the accommodating cavities is filled with one of the filling assemblies.

7. The sprint dumbbell according to any one of claims 1 to 4, characterized in that: The sprint dumbbell also includes a fitting connected to the cavity wall of the accommodating cavity, and the fitting can soundproof and / or buffer the impact force of the filling component on the dumbbell body.

8. The sprint dumbbell according to any one of claims 1 to 4, characterized in that: The sprint dumbbell also includes a motion sensor disposed on the dumbbell body and used for collecting motion parameters.

9. The sprint dumbbell according to any one of claims 1 to 4, characterized in that: The dumbbell body comprises a hand-held portion and a support portion connected to the hand-held portion, and the support portion is magnetic.

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