"Hearst Magazines and Yahoo may earn commission or revenue on some items through the links below." IF YOU'RE FAMILIAR with the words “abduction” and “adduction” but you're not exactly sure what they ...
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. Your shoulders are an ...
According to experts, it takes just four exercises to absolutely rip your top half to shreds—so you can start building muscle.
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