Swiss-Ball Pike

START: Assume a pushup position with your arms completely straight. Rest your shins on a Swiss ball. Your body should form a straight line from your head to your ankles. Your hands should be below your shoulders.

MOVEMENT: Without bending your knees, roll the Swiss ball toward your body by raising your hips as high as you can toward the ceiling. Don't round your lower back. Pause, the return the bacll to the starting position by lowering your hips and rolling the ball backward.