Inertial device and method of implementing an inertial device

1. A handheld exercise device comprising:

an elastically deformable body comprising a hollow tubular structure defining a closed loop interior, the elastically deformable body defining a through hole, wherein the elastically deformable body is configured to receive within the hollow tubular structure a mass movable along the closed loop interior; and

a handle positioned in the through hole and connected to the elastically deformable body, the handle configured to be grasped by a user,

wherein the elastically deformable body is configured to deform in response to a force applied to the handheld exercise device by the user.

2. The handheld exercise device of claim 1 , wherein:

the handle extends along a first axis; and

the mass is rotatable along the closed loop interior about a second axis perpendicular to the first axis.

3. The handheld exercise device of claim 2 , wherein:

the elastically deformable body comprises an inner surface and an outer surface, the inner surface being parallel to the second axis, and the outer surface being curved relative to the second axis.

4. The handheld exercise device of claim 2 , wherein at least part of the elastically deformable body is configured to deflect from a first position relative to the handle to a second position relative to the handle in response to the force applied by the user, the first position offset relative to the handle in a first direction along the second axis, and the second position offset relative to the handle in a second direction along the second axis.

5. The handheld exercise device of claim 1 , wherein the elastically deformable body comprises a plurality of interconnected components to form the elastically deformable body.

6. The handheld exercise device of claim 1 , wherein the handle comprises a plurality of ridges spaced apart along at least a portion of a surface of the handle.

7. The handheld exercise device of claim 1 , wherein the elastically deformable body is configured to deform from a first cross-sectional shape to a second cross-sectional shape in response to the force applied to the handheld exercise device by the user.

8. The handheld exercise device of claim 1 , wherein the elastically deformable body comprises:

a first state in which the elastically deformable body is not deflected relative to the handle;

a second state in which a portion of the elastically deformable body is deflected relative to the handle in a first direction; and

a third state in which the portion of the elastically deformable body is deflected relative to the handle in a second direction opposite the first direction.

9. The handheld exercise device of claim 1 , wherein:

the elastically deformable body is configured such that the mass received within the hollow tubular structure moves along the closed loop interior in response to a torque applied to the handheld exercise device by the user.

10. The handheld exercise device of claim 1 , wherein:

the handle is configured to be grasped by the user to allow the user to move the handheld exercise device in a punching motion in which the force is applied to the handheld exercise device and a torque is applied to the handheld exercise device; and

the elastically deformable body is configured such that the elastically deformable body deforms in response to the force applied to the handheld exercise device in the punching motion and the mass received within the hollow tubular structure moves along the closed loop interior in response to the torque applied to the handheld exercise device in the punching motion.

11. The handheld exercise device of claim 1 , wherein:

the elastically deformable body comprises one or more elastic devices configured to flex in response to the force.

12. The handheld exercise device of claim 11 , wherein the one or more elastic devices are one or more elastic hoops.

13. The handheld exercise device of claim 1 , further comprising:

the mass, the mass comprising at least one mass selected from the group consisting of: a fluid, a solid mass, a ball, a grain, a granular element, or a ring.

14. The handheld exercise device of claim 1 , comprising:

an elastic element configured to allow relative movement between the handle and a portion of the elastically deformable body.

15. The handheld exercise device of claim 1 , wherein:

the handle is connected to the elastically deformable body at at least two locations along the elastically deformable body.

16. The handheld exercise device of claim 1 , wherein the handle is fixedly connected to a portion of the body.

17. A handheld exercise device comprising:

a body comprising a hollow tubular structure defining a closed loop interior, the body defining a through hole, wherein the body is configured to receive within the hollow tubular structure a mass movable along the closed loop interior; and

a handle positioned in the through hole and connected to the body, the handle configured to be grasped by a user,

wherein the body comprises:

a first state in which the body is not deflected relative to the handle;

a second state in which a portion of the body is deflected relative to the handle in a first direction; and

a third state in which the portion of the body is deflected relative to the handle in a second direction opposite the first direction.

18. The handheld exercise device of claim 17 , wherein:

the body is configured to move from the first state to the second state or from the first state to the third state in response to a force applied to the handheld exercise device by the user.

19. The handheld exercise device of claim 18 , wherein:

the body is configured to deform from a first cross-sectional shape to a second cross-sectional shape in response to the force applied to the handheld exercise device by the user.

20. The handheld exercise device of claim 17 , wherein:

the handle extends along a first axis; and

the mass is rotatable along the closed loop interior about a second axis perpendicular to the first axis.