From squat jumps to snatches, you’d think that all you really need in your strength-training script to power your runs are exercises that require your muscles to move. After all, running itself is a ...

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If you’ve ever held a plank, paused at the bottom of a squat or pressed your palms together in front of your chest, you’ve done an isometric exercise. Ta-da! These holds might look simple — after all, ...

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. While many types of ...