Sawka M N, Knowlton R G, Glaser R M, Wilde S W, Miles D S
J Hum Ergol (Tokyo). 1979 Dec;8(2):83-90.
The purpose of this study was to compare metabolic and cardiopulmonary responses for submaximal and maximal exercise performed several days preceding (pre-test) and 45 min after (post-test) 21 miles of high intensity (70% VO2 max) treadmill running. Seven aerobically trained subjects' oxygen uptake, oxygen pulse, respiratory exchange ratio, heart rate, pulmonary ventilation, ventilatory equivalent of oxygen, and blood lactate concentration were determined for exercise during the pre- and post-test sessions. No differences were found for submaximal oxygen uptake, oxygen pulse, pulmonary ventilation and ventilatory equivalent of oxygen between the pre- and post-test values. Generally, submaximal heart rate responses were higher, and respiratory exchange ratio values were lower during the post-test. Reductions of maximal work time (12%), maximal oxygen uptake (6%) and maximal blood lactate concentration (47%) were found during the post-test. Thermal stress and glycogen depletion are possible mechanisms which may be responsible for these observed differences.
本研究的目的是比较在21英里高强度（最大摄氧量的70%）跑步机跑步前几天（预测试）和跑步后45分钟（后测试）进行次最大强度和最大强度运动时的代谢和心肺反应。测定了7名有氧训练受试者在预测试和后测试期间运动时的摄氧量、氧脉搏、呼吸交换率、心率、肺通气量、氧通气当量和血乳酸浓度。预测试和后测试值之间的次最大摄氧量、氧脉搏、肺通气量和氧通气当量没有差异。一般来说，后测试期间次最大心率反应较高，呼吸交换率值较低。后测试期间发现最大工作时间减少了12%，最大摄氧量减少了6%，最大血乳酸浓度减少了47%。热应激和糖原耗竭可能是导致这些观察到的差异的机制。
