Figure 3. Time course of SpO2 during rest, the 30 s Wingate test and recovery in hypoxia and normoxia. SpO2 = percutaneous arterial oxygen saturation. Nor = normoxia. Hyp = hypoxia. * p < 0.05 Athletic v.s. Untrained in hypoxia; p < 0.05 hypoxia v.s. normoxia in both groups.