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.