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. January 25, 2019 Add ...
If you haven’t picked up a jump rope since your school days, you’re in for a surprise. Jumping rope packs the same intensity as an 8-minute-mile run or a 20-mile-per-hour bike ride. There’s a reason ...
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