A few weeks ago, I interrupted my regular routine of powerlifting workouts to run a half marathon. I raced it all-out, and woke up the next day with a killer case of delayed onset muscle soreness. But ...

While there are plenty of fancy gadgets you can use to track your effort in the gym or on a run, there’s one core metric that uses no tech at all: the rate of perceived exertion. RPE in the most basic ...

If you’ve ever thought to yourself during a workout, wow this is super challenging, a 10 out of 10 for sure, you’ve actually been using RPE (rate of perceived exertion) to measure your exercise ...