Push Up Jacks
A more challenging version of the basic jumping jack exercise, this combo move really works your arms.
Begin on the floor in a push up position with your arms shoulder width apart and your wrists directly below your shoulders.
Bend your elbows to lower your body about half way down to the floor. As you push your body back up, hop your feet and hands together.
Perform another half push up, and as you come up, hop your feet and hands back out to the starting position.