1. Lie on the Swiss ball on your back, with your hands behind your head, elbows out to the side. Your feet should be flat on the floor.
2. Slowly raise your upper torso, using your abdominal muscles. As you lift up, rotate your torso to the right side, return to the center and then lower back to the starting position. Repeat, alternating sides .
The Work-Out: Do 2 sets of 10-15 repetitions.
Make sure to: Always keep your elbows directed outward.