Getting in the Starting Position
Lie flat on your back with your legs straight on the floor on either side of the exercise ball. Hold your hands clasped behind your head.
Bring your legs up to the ceiling, holding the exercise ball between your calves and ankles. Keep your torso flat on the ground. Bring your shoulder and head up slightly into the beginning of a crunch.
On an exhale, twist so that your right elbow almost touches your left knee. Allow the ball to roll a little as your legs twist.
Twist to the other side, touching your left elbow almost to your right knee.