Primary Muscle Group: Abdominals
Preparation: Lie on your back and place your arms at your sides with your palms facing the floor. Grasp the ball between your calves with your legs extended.
Breathing: Exhale as you curl up.
Execution: Grasp the ball with your calves and your legs towards the ceiling. Curl upper back off the floor and reach your arms past your thighs. Slowly return to the starting position.
Comments: This is a great lower abdominal exercise.