All you need is a kettlebell. A TikToker has gone viral with his simple fitness hack to run faster, and it actually works. Hermes the Cynic, as he’s known on social media, classifies himself as an ...
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. Cardio is good for us, ...
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