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John resurfaces the age old debate about whether or not you can actually shape a muscle. Is there any truth to old legends like saying preacher curls work your "lower" biceps and concentration curls hit the "upper" biceps? Not quite, but you might be surprised with the findings of the study covered in this episode. John always reviews the full text of every article, but to see the abstract of the study discussed, click here: http://www.ncbi.nlm.nih.gov/pubmed/23657165
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