Lately, my back feels as if it’s been pieced together with paper mache: It's stiff, inflexible, and rigid, yet fragile. My uppermost postural muscles ache as if I’ve been handlebar-hunching at a spin ...
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. If you’ve been ...
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