How to stop knees from involuntarily curling up to a sitting position when doing pull-ups and chin-ups - Quora

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How to stop knees from involuntarily curling up to a sitting

How to stop knees from involuntarily curling up to a sitting

How to Do PROPER Pull-ups for Beginners! (Stop Swinging)

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What Should I Do With My Legs During Pull-Ups?

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Why is it that, when doing the butterfly stretch, most people's