Remember back in grade school, when jumping rope at the playground or in your backyard was a totally fun, carefree activity? Whether you did Double Dutch or skipped to Miss Mary Mack, you probably ...

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 ...

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Mercey Livingston is a health and wellness writer and certified Integrative Nutrition Health Coach. She's written about fitness and wellness for Well+Good, Women's Health, Business Insider, and ...