Metabolic and endocrine responses to graded exercise under acute hypoxia.

摘要: Eight male subjects (24±1 years old) performed graded ergocycle exercises in normoxic (N) and acute hypoxic (H) conditions (14.5% O2). $$\dot V_{O_{_2 max} } $$ decreased from 55.5±1.3 to 45.8±1.4 ml · kg−1 min−1 H condition. Plasma glucose free fatty acid concentrations remained unchanged throughout exercise both conditions. Increase blood lactate concentration was associated with relative workload At were similar the two conditions, plasma insulin, glucagon, LH did not significantly change either. δ4-androstenedione testosterone increased a manner Finally norepinephrine reached at lower hypoxia. These results suggest that moderate hypoxia does affect metabolic hormonal responses short at workloads, i.e. when reduction of due is taken into consideration. The catecholamine response maximal under might sympathetic could be related as well absolute workloads.