HOW: Place a bosu on the ground with the blue side up. Place your hands on the ball about shoulder width apart with your elbows straight, feet straight out and your toes pushing into the ground. Perform a normal push up and at the bottom explode up by pushing off of the ball as quick as you can. Land in the push up position and repeat.
FEEL: You should feel your chest and shoulder muscles working.
COMPENSATION: Keep your back/body flat as you perform the push up.
