Lavoie J M
Eur J Appl Physiol Occup Physiol. 1982;48(1):127-33. doi: 10.1007/BF00421172.
This study was designed to compare the influence of two modes of exercise (swimming and leg cycling) on the blood concentrations of metabolic substrates and metabolites during a 45-min exercise period. Eight college students (mean age = 21.6 +/- 1.2 year) exercised at 70% of VO2 max, in water using the front crawl on one occasion, and on a cycle ergometer using the legs on another. Blood samples were drawn at 0, 15, 30, and 45 min and analyzed for free fatty acids, glycerol, glucose, pyruvate, and lactate concentrations. Mean oxygen uptakes (2.23 vs 2.12 l . min-1) and heart rates (152 vs 150 b . min-1) for cycling and swimming respectively were not significantly different. Lactate and pyruvate were significantly (p less than 0.01) higher during swimming as compared to cycling. Free fatty acids, glycerol, and glucose were not significantly different between the two modes of exercise (p greater than 0.05). Assuming venous blood concentrations provide some indication of metabolic events, these data are compatible with a tendency to a higher relative carbohydrate oxidation rate during swimming as compared to cycling during prolonged exercise at the same relative work intensities.
本研究旨在比较两种运动方式（游泳和腿部骑行）在45分钟运动期间对代谢底物和代谢产物血浓度的影响。八名大学生（平均年龄 = 21.6 +/- 1.2岁）以最大摄氧量的70%进行运动，一次在水中采用自由泳，另一次在自行车测力计上使用腿部运动。在运动0、15、30和45分钟时采集血样，并分析游离脂肪酸、甘油、葡萄糖、丙酮酸和乳酸浓度。骑行和游泳的平均摄氧量（分别为2.23对2.12升·分钟-1）和心率（分别为152对150次·分钟-1）无显著差异。与骑行相比，游泳时乳酸和丙酮酸显著升高（p < 0.01）。两种运动方式之间游离脂肪酸、甘油和葡萄糖无显著差异（p > 0.05）。假设静脉血浓度能反映一些代谢事件，这些数据表明在相同相对工作强度的长时间运动中，与骑行相比，游泳时有相对较高的碳水化合物氧化率趋势。
