By eHow Sports & Fitness Editor
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Physio balls, or Swiss exercise balls are commonly used in physical therapy, but can also make a great addition to your regular fitness routine. These flexible balls work your body's muscles at the core, as you are forced to engage your muscles in order to maintain balance. The physio ball range of motion exercise is a great way to loosen up the hips and get you ready for deeper stretches or exercises.
eHow Sports & Fitness Editor