Green H, Houston M, Thomson J, Reid P
Can J Physiol Pharmacol. 1979 Jun;57(6):615-8. doi: 10.1139/y79-094.
The relationship between ventilation (VE), oxygen consumption (VO2), and carbon dioxide production (VCO2) during work were studied in four trained males during exercise-induced carbohydrate depletion. Repeated bouts of heavy treadmill exercise (6 min at 95% VO2 max) were performed once per hour for 24 h in order to promote a shift in energy substrate from carbohydrate to fat. Measurements of VO2 and VCO2 recorded during each minute indicated that VO2 was unaffected by the number of runs, whereas VCO2 showed a progressive reduction which amounted to 24% during the final run. A corresponding decline of 19% was observed in the respiratory exchange ratio. No significant change in VE occurred between any of the runs. It is concluded that during heavy, repeated, muscular exercise, reductions in VO2, strongly suggestive of an increased fat oxidation, are not accompanied by a corresponding change in ventilation.
在4名受过训练的男性运动诱导碳水化合物耗竭期间，研究了工作时通气量（VE）、耗氧量（VO2）和二氧化碳产生量（VCO2）之间的关系。为了促使能量底物从碳水化合物向脂肪转变，每小时进行一次重复的高强度跑步机运动（以最大摄氧量的95%进行6分钟），持续24小时。每分钟记录的VO2和VCO2测量结果表明，VO2不受跑步次数的影响，而VCO2呈现逐渐降低的趋势，在最后一次跑步时降低了24%。呼吸交换率相应下降了19%。在任何一次跑步之间，VE均未发生显著变化。得出的结论是，在高强度、重复性的肌肉运动期间，VO2降低，强烈提示脂肪氧化增加，但通气量并未发生相应变化。
