Begin in a push-up position (tight abdominals). Perform a push-up with one hand on the ball. After performing the push-up, walk your off hand over and feet and center yourself with both hands on the ball. Perform another push-up. Then walk your feet over to the other side and take your other hand off the ball. Perform a push-up in this position. Repeat by going back in the opposite direction. Each individual push-up is one repetition.
Mensinger Performance and Fitness Systems 