so, what's the deal with sitting on your fitness ball? my friend says she knows someone who only sits on her fitness ball at home and that this chick has abs of steel.
another friend says that some of her co-workers sit on their fitness balls while they are at work because they are convinced that it works their abs all day.
does anyone else sit on their fitness ball all the time? if so, have you noticed whether it's significantly working your stomach muscles?
another friend says that some of her co-workers sit on their fitness balls while they are at work because they are convinced that it works their abs all day.
does anyone else sit on their fitness ball all the time? if so, have you noticed whether it's significantly working your stomach muscles?