If you can not hold yourself
in the
push up position and place your feet on the ball, start by lying with your
stomach on the ball and walk your hands forward until your legs are on the ball.
• Plank (arms and core)
In a
push up position (hands directly below shoulders, feet hip width apart), tighten your
stomach muscles and flatten your back to make a straight line from your heels to the top of your head and hold.