What kind iexcercise: ? And what is the front if the hand? Are you talking so the palm? Or the top? If the palm and you were grabbing something like weights or a chin up bar or a monkey bar that would be secondary to friction if not please give more info....
Answered 9/27/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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