Stand tall with feet shoulder width apart and a medicine ball in hands at chest height. Make sure you have either a partner to catch the ball or a solid and sturdy wall for the ball to bounce back to you. Stand 2-3 feet from the wall. Partners can be further back. With both hands placed evenly on the ball, quickly push the ball on a straight line away from your chest as forcefully as you can. Catch the ball from either your partner or off the wall and repeat.