Do you really need a heart rate monitor to tell you how hard you're working? It turns out you probably already innately know, and that's where the Rating of Perceived Exertion (RPE) scale comes in. Read the transcript at http://www.quickanddirtytips.com/health-fitness/exercise/rpe-scale Check out all the Quick and Dirty Tips shows: www.quickanddirtytips.com/podcasts FOLLOW GET-FIT GUY Facebook: https://www.facebook.com/GetFitGuy Twitter: https://twitter.com/getfitguy