In the fitness world, the focus is usually on how much weight you lift, the number of reps, or the intensity of your cardio. But there's a silent yet crucial factor that determines the effectiveness ...

Knowing how many sets to do per workout is a minefield. In fact, just listening to your PT reel off the many different types of set names can feel like you've landed in a foreign country. That's why ...

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 typical strength- or ...

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. Counting is hard. Yeah ...