Core exercise device

1. An exercise device, comprising:

(a) a body engagement portion configured to support a user, wherein the body engagement portion comprises a base surface configured to support the user in a standard plank position; and

(b) a ground engagement portion comprising an arched contact surface, wherein the arched contact surface is configured to allow the user to rotate between a first side plank position, the standard plank position, and a second side plank position relative to a support surface while the arched contact surface remains in contact with the support surface and the body engagement portion supports the user.

2. The exercise device of claim 1 , wherein the ground engagement portion comprises a first end and, a bottom portion, and a second end, wherein the first end, the second end, and the bottom portion form a U-shape.

3. The exercise device of claim 2 , wherein the body engagement portion comprises:

(a) a first interior surface associated with the first end, and

(b) a second interior surface associated with the second end.

4. The exercise device of claim 3 , wherein the first interior surface and the second interior surface are configured to support a portion of the bodyweight of the user while the user is in the first side plank position and the second side plank position, respectively.

5. The exercise device of claim 4 , wherein a portion of the body engagement portion extends from the first interior surface and the second interior surface.

6. The exercise device of claim 4 , wherein the base, the first interior surface, and the second interior surface cooperatively define a U-shaped opening.

7. The exercise device of claim 6 , wherein the body engagement portion further comprises:

(a) a first shoulder pad extending from the first interior surface into the U-shaped opening, and

(b) a second shoulder pad extending from the second interior surface into the U-shaped opening.

8. The exercise device of claim 7 , wherein the body engagement portion further comprises a first elbow pad and a second elbow pad.

9. The exercise device of claim 8 , wherein the first elbow pad and the second elbow pad extend from the base into the U-shaped opening.

10. The exercise device of claim 1 , wherein the body engagement portion further comprises a forearm support extending distally from the base surface.

11. The exercise device of claim 10 , wherein the forearm support is configured to selectively attach to the rest of the body engagement portion.

12. The exercise device of claim 10 , wherein the body engagement portion further comprises a gripping section associated with the forearm support.

13. The exercise device of claim 12 , wherein the gripping section comprises a pair of grips that are configured to selectively adjust into multiple positions on the forearm support.

14. The exercise device of claim 1 , wherein the arched contact surface comprises a laterally arched profile having a radius of curvature.

15. The exercise device of claim 14 , wherein the radius of curvature is constant.

16. The exercise device of claim 1 , wherein the arched contact surface comprises a longitudinally extending arched profile.

17. The exercise device of claim 16 , wherein the longitudinally extending arched profile extends uninterrupted between a front side of the ground engagement portion and a backside of the ground engagement portion.

18. An exercise device, comprising:

(a) a body engagement portion configured to support a user, wherein the body engagement portion comprises:

(i) a base surface configured to support a user in a standard plank position,

(ii) a pair of shoulder pads, and

(iii) a pair of elbow pads longitudinally displaced from the pair of shoulder pads; and

(b) a ground engagement portion comprising a laterally arched contact surface, wherein the laterally arched contact surface is configured to allow a user to rotate between a first side plank position, the standard plank position, and a second side plank position while maintaining contact with a support surface.

19. The exercise device of claim 18 , wherein the ground engagement portion comprises a U-shaped body.

20. An exercise device, comprising:

(a) a body engagement portion configured to support a user, wherein the body engagement portion comprises:

(i) a base surface configured to support a user in a standard plank position,

(ii) a forearm support extending from the base surface, and

(iii) a gripping section associated with the forearm support; and

(b) a ground engagement portion configured to allow a user to rotate between a first side plank position, the standard plank position, and a second side plank position relative to a support surface while the ground engagement portion remains in contact with the support surface and the body engagement portion supports the user.