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While this is an old question, I don't think any of the current answers are adequate. In the video linked, the exercise demonstrated is similar to a wide-grip pushup, but with the forearms supinated. The video clearly shows that during the concentric portion of the movement, the elbows are extending, the scapulae are protracting, and the arms are undergoing ...


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I don't know how old this is, the thumbs are pointing up because it helps engage your lats. You are driving your hands into the floor. Think of it as trying to do a face-down lat pull-down. You're trying to lift off the ground by pulling your elbows down in front of you with your arms locked. If you have your elbows bent and straighten them as you move, ...


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