Lying on floor with knees bent in line with hips and feet on top of ball, contract abs and lift head and upper shoulders off floor, grasping lower legs with palms.

Slowly straighten legs, rolling ball away from hips and raising arms straight above head, next to ears. Slowly bend knees, rolling ball back toward hips and moving arms out to sides and back to legs as you repeat for all reps. Keep head and shoulders lifted for entire set. Strengthens abdominals