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Ergospirometric variables during the 30 s sprint in normoxia (red circles) and the first minute of the recovery period (blue triangles) (Study I). (a) Power output; (b) pulmonary ventilation (VE); (c) carbon dioxide production (VCO2); (d) ventilatory equivalent for O2 (VE/VO2); (e) heart rate (HR); (f) oxygen consumption (VO2); (g) respiratory exchange ratio (RER); and (h) ventilatory equivalent for CO2 (VE/VCO2); the error bars represent the standard error of the mean, n = 20.
