Rating perceived exertion during high-intensity treadmill running. Med Sci Sports Exerc

the time course of the rating of perceived exertion (RPE; 6–20 Borg scale) during short-term, high-intensity, constant-load running (ST); and 2) to determine the reproducibility of RPE during ST. Methods: Fifteen well-trained males (V ˙ O2max 58.0 4.6 mL·kg1·min1, mean SD) performed treadmill running (i.e., between 3 and 4 m·s1 at 10.5 % incline) to volitional exhaustion (Tlim) at an exercise intensity equivalent to 125 % V ˙ O2max. A total of four RPE measurements were taken during each test, one every 30 s during the first 120 s of the exercise. The tests were repeated at the same time of day on three occasions within a 3-wk period. Results: Tlim for the three tests was 197.6 34.8 s. RPE was linearly related with exercise time (mean SD for the three tests: RPE at 30