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. Here are all the ways ...
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What Is Zone 2 Cardio, and How Do I Actually Do It?
Low-intensity cardio—sometimes called LISS or “zone 2”—is a previously-underrated form of exercise. It’s finally coming back into fashion after spending years on the sidelines while HIIT and ...
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