09/14/2011 08:26 am ET Updated Nov 14, 2011

Choose The Right Stability Ball For Your Workout (Video)

You walk into the gym. You've got a game plan. You reach for a stability ball to start your workout and... there are 14 different sizes. How do you choose the right one for your workout? Fitness expert Annick Robinson demonstrates how to pick out a stability ball for wherever your workout takes you.

And if you don't have a plan, Robinson's got one for you, that's chock-full of balance challenges, core exercises and more.