How to increase the pull-up on the bar?
5 BEST EXERCISES FOR THE PULL UP BAR
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Chest To Bar Pull-ups for CrossFit® - Increase Your Strict Strength With This Progression
Improve Grip Strength for Pull-ups, Toes-to-Bar, and Deadlifts by CrossFit Redux
if so, can you please tell us more about the diet of sports supplements, etc.