Relationship among blood lactate and plasma catecholamine levels during exercise in acute hypoxia.


Five male subjects performed steady exercise on a cycle ergometer at an intensity of 60% maximal O2 uptake (VO2max) for 6 min on three separate occasions while breathing gas mixtures of 12,16 or 21% O2 in N2. Expired gas fractions, ventilation, heart rate, arterial O2 saturation (SaO2), blood lactate (La) and plasma catecholamines (epinephrine: E and… (More)


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