Begin by placing your shins on top of the stability ball and get into a pushup position.
STEP 2
While keeping your body in a straight line, rotate your legs until the ball is on the side of one of your legs. Your hips should be twisted in comparisson to your upper body.
STEP 3
Return to the start position and repeat with the other side.
Special Notes
If you have problems balancing yourself while on your shins, then move the ball up to your thighs and try the exercise. After a few weeks you should be used to the balance aspect of this movement so try the exercise on your shins (again).