1) Assume back lying position on floor. Place hands at sides with palms down on floor.
2) Start position: Place heels of both feet on top of stability ball. Raise hips off floor.
3) Curl heels toward glutes by flexing at the knee. Hips should remain off floor.
4) Return to start position.
5) Remember to maintain stability of ball by utilizing muscles in the trunk and core. To increase difficulty, cross arms hands over chest to take away base of suppport.
