How do you increase muscle mass? lift against a resistance until your muscle fails, ideally on the third set of repetitions you cannot lift more than 8times. http://ow.ly/Ozkkm
How do you increase muscle mass? lift ag
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How do you increase muscle mass? lift against a resistance until your muscle fails, ideally on the third set of repetitions you cannot lift more than 8times. http://ow.ly/Ozkkm