Understanding the Rate of Perceived Exertion (RPE) scale is like having your own intensity meter providing constant feedback on your exercise routine. The Borg RPE scale (see chart below) gives you an idea of how hard you are training and whether you need to pick up or slow the pace. Having a good approximation of how fast your heart is beating during exercise is a way to ensure you are exercising to reach your goals. RPE Defined The Borg RPE rating scale ranges from 6 to