THE CHEST—AND the muscle-pumping workouts it encourages—takes up a great deal of attention for physique-minded guys. If you pause a moment to think about why, you won't need long to figure out the ...
Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. The major muscle in ...
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