2.3.3. Training Load Monitoring

Internal Loads

Regarding internal loads, subjective measures were used. The CR-10 scale was used to quantify each player rate of perceived exertion (RPE) [32]. Based on the CR-10 scale, a value of 1 means "very light activity" and a value of 10 means "maximal exertion". Approximately 10 to 30 min after each training session, the RPE was individually collected and without the influence of others [33]. All players were familiarized with the RPE scale. Furthermore, to obtain the session-rate of perceived exertion (s-RPE), the RPE value attributed by each player was multiplied by the duration in minutes of each training session [34]. Thus, the s-RPE (expressed in arbitrary units [A.U.]), was used as the final outcome of subjective internal load measure to be analyzed in the present study. sRPE general, sRPE breath, and sRPE neuromuscular were also monitored as recommended elsewhere, for professional soccer players [19].
