Apr 15, 2011 5:30 PM:
Do not do this exercise if you have bad knees because it puts a heavy strain on the ligaments and tendons surrounding the kneecaps.
Do not do this exercise if you have bad knees because it puts a heavy strain on the ligaments and tendons surrounding the kneecaps.-See Less
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Apr 15, 2011 5:30 PM: Do not do this exercise if you have bad knees because it puts a heavy strain on the ligaments and tendons surrounding the kneecaps.