Mitchell J B, Costill D L, Houmard J A, Fink W J, Robergs R A, Davis J A
Human Performance Laboratory, Ball State University, Muncie, IN 47306.
Med Sci Sports Exerc. 1989 Jun;21(3):269-74.
Gastric emptying: influence of prolonged exercise and carbohydrate concentration, Med. Sci. Sports Exerc., Vol. 21, No. 3, pp. 269-274, 1989. The purpose of this study was to examine the effects of serial feedings of different concentrations of carbohydrate (CHO) on gastric emptying and to compare the rates of gastric emptying at rest and during prolonged exercise. Solutions of 0, 6, 12, and 18 g. 100 ml-1 (WP, CHO-6, CHO-12, and CHO-18, respectively) were tested. Ten trained male cyclists performed five trials involving 120 min of cycling. The first 105 min were at 70% of VO2max, and the final 15 min were an all-out self-paced performance ride. In one of the five trials, the subjects rode intermittently, completing seven 15-min rides at 70% of VO2max, with 3 min of rest between each ride. Every 15 min, approximately 150 ml (8.5 ml.kg-1.h-1) of one of the four test solutions were consumed. (In the intermittent trial, the CHO-12 solution was used.) Subjects were also tested during 120 min of seated rest using the above feeding schedule (6% solution). Gastric residue was determined by stomach aspiration following the performance ride. The volumes emptied during the CHO-12 and CHO-18 trials (1,049.8 and 889.2 ml) were significantly different from each other and were less than during the WP and CHO-6 trials (1,210.3 and 1,185.6 ml) (P less than 0.05). CHO delivery was significantly higher in the CHO-12 and CHO-18 trials (126 and 160 g) compared to the CHO-6 trial (71.1 g).(ABSTRACT TRUNCATED AT 250 WORDS)
长时间运动和碳水化合物浓度的影响，《医学与科学：运动与锻炼》，第21卷，第3期，第269 - 274页，1989年。本研究的目的是检验不同浓度碳水化合物（CHO）的连续喂食对胃排空的影响，并比较静息状态和长时间运动期间的胃排空速率。测试了0、6、12和18克/100毫升（分别为WP、CHO - 6、CHO - 12和CHO - 18）的溶液。十名受过训练的男性自行车运动员进行了五次试验，包括120分钟的骑行。前105分钟以最大摄氧量（VO2max）的70%进行，最后15分钟是全力自行节奏的骑行。在五次试验中的一次，受试者间歇性骑行，以VO2max的70%完成七次15分钟的骑行，每次骑行之间休息3分钟。每隔15分钟，摄入约150毫升（8.5毫升/千克·小时）四种测试溶液中的一种。（在间歇性试验中，使用CHO - 12溶液。）受试者在120分钟的静息坐姿期间也按照上述喂食方案（6%溶液）进行了测试。骑行结束后通过胃抽吸确定胃残余量。CHO - 12和CHO - 18试验期间排空的体积（1049.8和889.2毫升）彼此显著不同，且小于WP和CHO - 6试验期间（1210.3和1185.6毫升）（P小于0.05）。与CHO - 6试验（71.1克）相比，CHO - 12和CHO - 18试验中的CHO输送量显著更高（126和160克）。（摘要截取自250字）
