Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...
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Pull-ups: The back-building exercise that transforms your upper body faster than machines
Mastering pull-ups is one of the most effective ways to build real-world strength, improve posture, and sculpt a powerful back using just your bodyweight.
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