Exercise device and methods

1. An exercise device for use on a ground surface, the exercise device comprising:

a platform having a long axis and a short axis, the platform comprising:

a planar top surface sized and shaped to support a body part of a user;

a bottom surface; and

a pair of handles comprising:

a first handle at least partially defined by a first opening in the platform and configured to be gripped in use; and

a second handle at least partially defined by a second opening in the platform and configured to be gripped in use;

a single cylindrical roller coupled to the platform and translationally fixed relative to the platform so as to rotate relative to the platform, the cylindrical roller supporting the platform above the ground surface, the support consisting of the cylindrical roller; and

a shaft supporting at least a portion of the cylindrical roller and defining a rotational axis of the cylindrical roller, the rotational axis of the cylindrical roller being parallel to the long axis of the platform;

wherein the platform is configured to translate in a first direction when the cylindrical roller rotates in a first direction of rotation;

wherein the platform is configured to translate in a second direction when the cylindrical roller rotates in a second direction of rotation; and

wherein at least a top of the cylindrical roller is disposed below the bottom surface of the platform.

2. The exercise device of claim 1 , wherein the first handle is defined by a front edge of the first opening and a front edge of the platform and the second handle is defined by a front edge of the second opening and the front edge of the platform.

3. The exercise device of claim 1 , further comprising a second pair of handles, the second pair of handles comprising:

a third handle at least partially defined by a third opening in the platform; and

a fourth handle at least partially defined by a fourth opening in the platform.

4. The exercise device of claim 3 , further comprising a strap extending between the first handle and the second handle.

5. The exercise device of claim 1 , further comprising a pair of supports extending from a bottom surface of the platform, wherein the supports are configured to support the roller.

6. The exercise device of claim 5 , wherein the shaft is configured to be received in an opening of each support.

7. The exercise device of claim 6 , wherein the shaft is configured to rotate within the openings of the supports.

8. The exercise device of claim 7 , wherein the supports comprise bearings supporting the shaft.

9. The exercise device of claim 1 , wherein all of the cylindrical roller is disposed below the bottom surface of the platform.

10. An exercise device for use on a ground surface, the exercise device comprising:

a platform having a long axis and a short axis, the platform comprising:

a planar top surface sized and shaped to receive a body part of a user;

a bottom surface; and

at least one handle configured to be gripped in use;

a single cylindrical roller coupled to the platform and translationally fixed relative to the platform so as to rotate relative to the platform, the cylindrical roller supporting the platform above the ground surface; and

a shaft supporting at least a portion of the cylindrical roller and defining a rotational axis of the cylindrical roller, the rotational axis of the cylindrical roller being parallel to the long axis of the platform;

wherein the platform is configured to translate in a first direction when the cylindrical roller rotates in a first direction of rotation;

wherein the platform is configured to translate in a second direction when the cylindrical roller rotates in a second direction of rotation; and

wherein at least a top of the roller is disposed below the bottom surface of the platform.

11. The exercise device of claim 10 , wherein the at least one handle is defined by an opening in the platform.

12. The exercise device of claim 11 , wherein the at least one handle is defined by a front edge of the platform and a front edge of the opening.

13. The exercise device of claim 10 , wherein the shaft is configured to rotate with the cylindrical roller.

14. The exercise device of claim 13 , further comprising a support extending from the platform, wherein the shaft is configured to rotate within an opening of the support.

15. An exercise device for use on a ground surface, the exercise device comprising a single cylindrical roller, a platform supported above the cylindrical roller, and a shaft, the cylindrical roller being coupled to the platform and translationally fixed relative to the platform so as to rotate relative to the platform, the cylindrical roller supporting the platform above the ground surface, the platform having a long axis, a short axis, a bottom surface, and a planar top surface sized and shaped to support at least a body part of a user above the cylindrical roller while the cylindrical roller rolls across the ground surface, the shaft supporting at least a portion of the cylindrical roller and defining a rotational axis of the cylindrical roller, the rotational axis of the cylindrical roller being parallel to the long axis of the platform, the platform being further configured to tilt fore and aft while the roller rolls across the surface, and at least a top of the cylindrical roller being disposed below the bottom surface of the platform.