Variable weight kettlebell

1. A kettlebell comprising:

a main body configured to retain one or a plurality of removable exercise weights, a handle fixedly connected to the main body at two separate attachment points on a top side of the main body, the two separate attachment points having a distance between them;

wherein the main body has an opening disposed on the top side, the opening having a width confined within the distance between the two separate attachment points of the handle, and the opening configured to receive the one or the plurality of removable exercise weights; wherein an inside surface of the main body forms a cavity which is substantially spherical in shape; and wherein the kettlebell is rigidly constructed.

2. The kettlebell of claim 1 , further comprising a restraint configured to cover at least a portion of the opening and retain the one or the plurality of removable exercise weights inside the main body.

3. The kettlebell of claim 2 , wherein the restraint comprises a removable lid separate from the handle.

4. The kettlebell of claim 3 , wherein the removable lid comprises:

a spring; and

two sliding latches disposed on either side of the spring, the sliding latches configured to engage with notches in the kettlebell when the spring is extended and to disengage with the notches in the kettlebell when the spring is compressed.

5. The kettlebell of claim 1 , wherein the main body further comprises a weight receptacle configured to retain the one or the plurality of removable exercise weights in an upright position.

6. The kettlebell of claim 5 , wherein the weight receptacle is configured to retain the plurality of removable exercise weights, wherein each of the plurality of removable exercise weights is rectangular.

7. A kettlebell comprising:

a main kettlebell body having a hollow portion in a center of the main kettlebell body, wherein the hollow portion is configured to retain one or a plurality of removable exercise weights in one or a plurality of slots arranged side-by-side;

an opening to the hollow portion on an exterior surface of the main kettlebell body configured to receive the one or the plurality of removable exercise weights;

a handle fixedly attached at two separate attachment points to the main kettlebell body outside of the opening; and

a restraint configured to cover the opening.

8. The kettlebell of claim 7 , wherein the restraint is shaped to match an exterior surface contour of the kettlebell.

9. The kettlebell of claim 7 , wherein the restraint is completely removable from the kettlebell body.

10. The kettlebell of claim 7 , wherein the hollow portion is configured to retain a first of the one or the plurality of removable exercise weights in the center of the main kettlebell body and still have space for a second of the one or the plurality of removable exercise weights on at least two sides of the first of the one or the plurality of removable exercise weights.

11. The kettlebell of claim 10 , wherein the hollow portion is configured to retain the plurality of removable exercise weights, wherein each of the plurality of removable exercise weights is rectangular.

12. A variable weight kettlebell system comprising:

a plurality of exercise weights; and

a kettlebell comprising:

a main body configured to hold one or a plurality of the plurality of exercise weights, and

a handle fixedly connected to the main body at two separate attachment points on a top side of the main body, the two separate attachment points having a distance between them;

wherein the main body has an opening disposed on the top side, the opening having a width confined within the distance between the two separate attachment points of the handle, and the opening configured to accept the plurality of exercise weights; wherein an inside surface of the main body forms a cavity which is substantially spherical in shape; and wherein the kettlebell is rigidly constructed.

13. The variable weight kettlebell system of claim 12 , further comprising:

a removable lid configured to cover the opening and lock the one or the plurality of the plurality of exercise weights within the opening.

14. The variable weight kettlebell system of claim 13 , wherein the removable lid comprises a padded material on an underside of the lid configured to be in contact with the one or the plurality of the plurality of exercise weights when the removable lid is in place.

15. The variable weight kettlebell system of claim 13 , further comprising a restraint.

16. The variable weight kettlebell system of claim 15 , wherein the restraint is disposed under the removable lid.

17. The variable weight kettlebell system of claim 12 , further comprising a weight receptacle structure within the main body, the weight receptacle structure configured to hold the one or the plurality of the plurality of exercise weights in a stationary position when the kettlebell is moved.

18. The variable weight kettlebell system of claim 12 , wherein the plurality of exercise weights are rectangular.

19. The variable weight kettlebell system of claim 12 , wherein the plurality of exercise weights are each the same size.