Figure 1From: VO2 and VCO2 variabilities through indirect calorimetry instrumentation The inter-subject variabilities analysis by power spectrums in the 0–0.5 Hertz frequency band. The averaged power spectrum functions vVO2(f) in graph (a) and the function vVCO2(f) in graph (b) show a cyclic rhythm at 0.025 Hz only during the orthostatic stage of the COM.Back to article page