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. 2020 Sep 18;11:550572. doi: 10.3389/fphys.2020.550572

Figure 2.

Figure 2

Test results of two subjects during a graded cycling exercise test until voluntary exhaustion with additional information to rating of perceived exertion (RPE) according to CR-10 scale from Borg (1982), lactate and ventilatory thresholds and a colored transition zone around DFA-alpha1 of 0.75 (start: 100W, increment: 20W, stage duration: 3 min). Subject A with a maximum achieved wattage of 360W and VO2PEAK of 49 ml/min/kg (LT1: 217W, VT1: 230W, LT2: 294W, VT2: 300W); Subject B with a maximum achieved wattage of 400W and VO2PEAK of 74 ml/min/kg (LT1: 210W, VT1: 240W, LT2: 310W, VT2: 340W). Lactate thresholds were determined according to Dickhuth et al. (1999) and ventilatory thresholds were determined according to Gaskill et al. (2001) and Binder et al. (2008); DFA-alpha1: short-term scaling exponent alpha1 of detrended fluctuation analysis, VO2PEAK: maximum oxygen uptake achieved in the graded exercise test, LT1: first lactate threshold, LT2: second lactate threshold, VT1: first ventilatory threshold, VT2: second ventilatory threshold.