“…In an attempt to simplify the training load quantification, Foster [ 111 ] introduced the use of the session rating of perceived exertion (sRPE) instead of using HR data or measuring the intensity of the session, or the type of exercise performed. The sRPE, obtained after the completion of training and/or the match, classifies the general difficulty of the session by multiplying the RPE by the duration of the exercise, in minutes [ 111 ] and, based on the scale of 0 to 10, has been widely used in the evaluation of internal load, both in training and in competition [ 7 , 9 , 10 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 24 , 26 , 28 , 29 , 30 , 31 , 32 , 39 , 61 , 65 , 66 , 67 , 68 , 69 , 70 , 72 , 74 , 75 , 77 , 78 , 79 , 80 , 81 , 84 , 85 ]. On the other hand, Coppalle [ 66 ] and Owen [ 86 ] used the 6–20 scale to determine sRPE.…”