Low-tech and inexpensive giant exercise balls, known as physioballs, Swiss balls and posture balls, can play an important part in your rehab – and they’re fun to have around! Working out on a ball requires balance, which means that you must recruit the deeper back muscles, rather than the large, superficial ones. Typical exercises include push-ups with the legs supported by on the ball, crunches with the back resting on the ball, and leg lifts (on your back) with the ball squeezed between the ankles. Some people use these balls as office chairs, with good results. To remain upright, you need to exercise good posture. If you’re interested in trying one out, check out the products available at FitBALL.