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A trainer explains how a single exercise on this overlooked machine can strengthen and protect your back.

As I'm writing this, I can feel my lower back crying out in pain. Working on a computer all day, all hunched up, is probably the worst thing you can do to your body, yet many of us are forced to keep ...

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. It’s easy to almost ...