Rating of Perceived Exertion (RPE) definition

A number on a scale of 0-10 that quantifies how hard you feel you are exercising during your workout.

Your rating is determined by paying attention to your overall effort, fatigue, and breathing during exercise. 0 represents no effort and 10 represents maximal effort.

RPE can be used alone or in combination with your heart rate to quantify the intensity of exercise. (A scale of 6-20 is sometimes used instead of a 0-10 scale.)

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