Stand Upright and place your hands above your head. Lift one leg up behind you and place it on the Stability Ball. Now you should be standing on one leg only. Slowly Squat down as far as you can keeping you stomach tight, hands above your head, and foot completely planted on the ground making sure that the heel does not come up off of the ground all while having your opposite leg on the ball behind you. When you go as far as you can down, come back up to the standing position and repeat keeping your balance throughout the exercise.