FIG. 1.

Z-TQR-RPE interpretation Z-score transformation was employed to evaluate daily variation of TQR and RPE respect to individual players average. Z-TQR and Z-RPE were combined through mathematical subtraction in order to quantify the variation of the state of recovery in relation to the variation of the perception of effort. Therefore, according to Kenttä & Hassmén [32] model, an increase in the training stress (RPE) associated with a lowering of the recovery status (TQR) was interpreted as a dangerous condition. Differently, a reduction in the daily perception of effort together with an increase in the recovery status was read as a preventive condition.