Houmard J A, Egan P C, Johns R A, Neufer P D, Chenier T C, Israel R G
Human Performance Laboratory, East Carolina University, Greenville, NC 27858.
Med Sci Sports Exerc. 1991 Mar;23(3):320-5.
The purpose of this study was to compare gastric emptying (GE) responses during intense, prolonged cycling and running. It is important to discern whether gastric emptying (GE) responses are exercise-mode specific, since the findings of cycling and running studies are often compared and applied to one another. Ten male biathletes cycled (CY) and ran (R) for 1 h at 75% of their mode-specific VO2max or rested (S) and consumed water (SW, CYW, RW) or a 7% carbohydrate solution (SC, CYC, RC) at a rate of 10 ml.kg-1.h-1 (approximately 180 ml at 0, 15, 30, and 45 min). No differences were found between CYW, CYC, RW, RC, and SC for volume of drink emptied (mean +/- SE) (522.8 +/- 47.9 ml) and GE rate (range, 8.2 +/- 0.9 (RC) to 9.3 +/- 0.6 ml.min-1 (SC]. A mean of 72.7 +/- 5.7% of the total consumed volume was emptied. The GE rate during SW was significantly (P less than 0.05) greater than the other conditions (11.3 +/- 0.4 ml.min-1, 94.0 +/- 1.9% of total consumed volume emptied). Substantial volumes of water and a 7% carbohydrate solution are thus emptied from the stomach during prolonged, intense running and cycling, with no differences in GE between these exercise modes. These data suggest that recommendations concerning GE are reciprocal between running and cycling bouts similar to those in the current study.
本研究的目的是比较在高强度、长时间的骑行和跑步过程中的胃排空（GE）反应。辨别胃排空（GE）反应是否具有运动模式特异性很重要，因为骑行和跑步研究的结果常常相互比较并应用。10名男性冬季两项运动员以其特定模式下最大摄氧量的75%进行1小时的骑行（CY）和跑步（R），或休息（S），并以10 ml·kg-1·h-1的速率摄入水（SW、CYW、RW）或7%的碳水化合物溶液（SC、CYC、RC）（在0、15、30和45分钟时约为180 ml）。在CYW、CYC、RW、RC和SC之间，排空饮料的体积（平均值±标准误）（522.8±47.9 ml）和胃排空率（范围为8.2±0.9（RC）至9.3±0.6 ml·min-1（SC））未发现差异。总摄入量的平均72.7±5.7%被排空。SW期间的胃排空率显著高于其他条件（P<0.05）（11.3±0.4 ml·min-1，总摄入量的94.0±1.9%被排空）。因此，在长时间、高强度的跑步和骑行过程中，大量的水和7%的碳水化合物溶液从胃中排空，这些运动模式之间的胃排空没有差异。这些数据表明，与本研究类似的跑步和骑行回合之间，关于胃排空的建议是相互通用的。
