Exercise: Pushups with Thighs on the Exercise Ball

Roll a stability ball into the middle of a gymnastics mat. Lay over the ball with your stomach on the ball and your hands shoulder width apart on the floor.
Roll over the ball & walk your hands out until the ball is under your thighs and your shoulders are directly over your hands.

Now slowly bend your arms, just like regular push-ups, and hold for about 2-5 seconds.

Return to the starting position and repeat 8-12 times.

Source: http://www.fitness.com/exercises/387/pushups_with_thighs_on_the_exercise_ball.php

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