Ever wonder what that odd looking half blue ball in the gym is for? You can use the bosu ball to add a balance challenge to many exercises. Even something as simple as a squat done on the bosu can ...

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You might have seen it at the gym, that half-inflated dome with a flat base. Looks simple, right? But don't be fooled by its appearance. The BOSU (which stands for "Both Sides Up," meaning you can use ...