Start by finding your balance on your knees on the exercise ball. Hold the medicine ball out in front of you with arms slightly bent (do not straighten elbows).Here you have access to hundreds of exercises with detailed instructions and pictures for each exercise step.
If you are registered you can add these exercises to your personal workout program and create an exercise plan that you can print. And, of course, you can change the program any time as you progress.
You just have to register (it's free) or login!