Area Targeted: Abs, Shoulders
Set up: Take an exercise ball and lie on top of it in a plank position with your shins on the ball, and your palms on the floor under your shoulders.
Movement: Pull you knees in as the ball rolls towards your toesRoll the ball to your middle, lifting your hips and keeping your head down between your arms. (Your body should be in an inverted "V" shape.)
Points To Remember:
1. Be sure to pull your abs in and keep your head even with your spine as you move your knees in and out.