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 ...

Walk into almost any gym, and you’ll notice a familiar pattern across the weight room. Some lifters treat every set like a ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty/Ben Welsh If you’ve never heard of RPE before, it simply stands for Rate of ...

RPE stands for the rate or rating of perceived exertion and is simply how hard you feel you are working. This makes it a subjective view of how hard an effort is. Used in tandem with more objective ...