They're only valid on that exact machine, and have nothing to do with the numbers on a similar machine at another gym. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as ...
We might earn a commission if you make a purchase through one of the links. The McClatchy Commerce Content team, which is independent from our newsroom, oversees this content. Do you love strength ...
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. Have you ever switched ...
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