The Stability Ball Skier

A VERY challenging core stability exercise I did today is the "Skier" on a stability ball.

Here's how you do it. Place you knees on the ball and hands on the floor, face down, as if you are about to do a knee roll-in. But instead of pulling your knees towards your chest, you twist from side to side like a pendulum. Your core gets absolutely worked as you try to keep your balance on the ball. Try to swing to each side 5 times. total of 10 per set. (btw, I can't even do that yet!!!)