Pull-up is a closed-chain an exercise that works almost all of the muscle groups on the upper body and provides both hypertrophy and strength at body weight.
wide grip pull ups: Wide grip pull-ups: How to, muscles worked
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Chin-Ups Mastery: Your Ultimate Guide to Perfecting the Pull
Muscles Worked in Pull Ups and Chin Ups
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BENEFITS OF PULL-UPS !
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Pull Ups For Beginners - How To Get Your First Pull Up
7 Benefits of Pull Ups: Why and How to Perform Pull Ups? — MO Marketplace