This is one of the more difficult ball exercises that works the abdominal muscles.
- Lying on the floor, have your legs extended straight up with the ball between your feet. Arms should be resting at your sides, head resting on the floor.
- Inhale and move legs down towards the floor to form a 120 degree angle. Hold for 2 seconds.
- Exhale, and extend your legs back up and over your head. Hold for 2 seconds, inhale, and return to start position for one rep.