Primary Muscle Group: Pectoralis Major

Muscle Groups Worked in This Exercise:  Pectoralis Major, Anterior Deltoid, Triceps Brachii

Preparation: Lie prone on floor with hands slightly wider than shoulder width. Place one hand on top of a medicine ball and make sure you keep your balance.  Raise body up off floor by extending arms with body straight.

Breathing:  Breath out on the contraction of the muscle and breath back in on the way back to the start position.