2. Do the ball exchange exercise. Do this 3 times per week. Lay on your back and extend your arms over your head. Make sure your legs are straight. Hold a stability ball in your hands over your head. Move the ball to your chest and meet the ball with your legs and put it between your ankles. Move the ball down to the floor with your legs and put your hands and arms back over your head. Repeat 10-12 times, making sure your back is pressed against the floor while you move.