RPE or Rate of Perceived Exertion has finally gained popularity as Garmin and other watches made it part of saving each ...

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 ...

It was a hot summer afternoon on Cold Soil Road, and I had just finished the “First Speed Run,” a guided run in the Nike Run Club app. It included eight one-minute inter­vals interspersed with one ...