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I’ve been hyperaware of overtraining ever since I suffered a pelvic stress fracture a decade ago. The injury came from excessive exercise and a lack of education around nutrition and recovery, but the ...

To boost your running performance, you consider strength training, but now you’ve got two major questions: Is that effort really necessary? And should I do high reps at a lower weight or low reps at a ...

Step foot in the gym and you'll likely spot two types of lifters: one busting out endless reps with lighter weights, and another lifting heavy loads for considerably less reps. Both have equally ...

Gym lore says that rep range determines whether you'll build strength, muscle, or endurance. However, load, speed, and "time under tension" are actually more important than the number of reps. Your ...

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. A few weeks ago, I ...