To estimate the parasympathetic withdrawal parameters (A, τ and AUC; Figure 1), the SD1 and RMSSD data were calculated until the stage corresponding to 85% of HRmax was achieved (SD1 85% HRmax and RMSSD 85% HRmax), as adapted from procedures outlined by Lewis et al. (6). The parasympathetic withdrawal was evaluated until this relative intensity because after the respiratory compensation threshold (~85% of HRmax), the combination of great venous blood return with high ventilatory activity, induces exacerbated mechanical and stretch stimulus on the heart sinus node. This induced electrical phenomenon causes increased HRV independent of vagal activity (9). Moreover, we also used the SD1 and RMSSD data until a fixed stage of 15 km.h-1 (SD1 15 km.h-1 and RMSSD 15 km.h-1) to avoid best performers reaching greater AUC because of their lower HR at a given intensity (5).