Department of Exercise Science and Physiology, School of Health Sciences, Prefectural University of Hiroshima, 1-1-71 Ujina-higashi, Minami-ku, Hiroshima 734-8558, Japan.
Department of Health Promotion and Development, Graduate School of Health Sciences, Hiroshima University, 1-2-3 Kasumi Minami-ku, Hiroshima 734-8551, Japan.
Nutrients. 2020 Jul 17;12(7):2118. doi: 10.3390/nu12072118.
This study examined the effect of carbohydrate drink ingestion timing on gastrointestinal tract blood flow and motility after mild cycling exercise. Eight healthy participants were randomly assigned to ingest a liquid solution with 75 g glucose at either 5 min (PE-5) or 30 min (PE-30) after a single bout of leg cycling exercise according to target heart rate (approximately 120 beats/min). As the control trial (Con), participants ingested the same liquid solution without exercise. Celiac artery blood flow (BF), superior mesenteric artery BF, and gastric emptying rate were assessed by ultrasonography before and for 60 min after ingesting the glucose solution. Blood lactate, glucose, and plasma insulin were also measured at baseline and for 60 min after ingesting the glucose solution. Celiac artery BF significantly decreased from resting baseline immediately after exercise in both the PE-5 and PE-30 trials, and then returned to resting baseline just before the ingestion of glucose solution in the PE-30 trial. After ingesting the glucose solution, changes in celiac artery BF, superior mesenteric artery BF, % gastric emptying rate, blood lactate, blood glucose, and plasma insulin were not significantly different among the three trials. The timing of nutrient ingestion after mild exercise does not seem to impact the subsequent gastrointestinal motility, blood flow, and glycemic responses.
本研究旨在探讨轻度骑行运动后碳水化合物饮料摄入时机对胃肠道血流和蠕动的影响。8 名健康参与者根据目标心率（约 120 次/分钟），在单次腿部骑行运动后 5 分钟（PE-5）或 30 分钟（PE-30）时随机摄入含有 75 克葡萄糖的液体溶液。作为对照试验（Con），参与者在没有运动的情况下摄入相同的液体溶液。在摄入葡萄糖溶液前后 60 分钟通过超声评估腹腔动脉血流（BF）、肠系膜上动脉 BF 和胃排空率。在摄入葡萄糖溶液前后 60 分钟还测量了血乳酸、血糖和血浆胰岛素。在 PE-5 和 PE-30 试验中，腹腔动脉 BF 在运动后立即从静息基线显著下降，然后在 PE-30 试验中在摄入葡萄糖溶液之前恢复到静息基线。摄入葡萄糖溶液后，三个试验中腹腔动脉 BF、肠系膜上动脉 BF、%胃排空率、血乳酸、血糖和血浆胰岛素的变化无显著差异。轻度运动后营养摄入的时间似乎不会影响随后的胃肠道蠕动、血流和血糖反应。
