Gastric emptying: Influence of prolonged exercise and carbohydrate concentration
Mitchell, J.B., Costill, D.L., Houmard, J.A., Fink, W.J., Robergs, R.A., & Davis, J.A. (1989) Gastric emptying: Influence of prolonged exercise and carbohydrate concentration. Medicine and Science in Sports and Exercise, 21(3), pp. 269-274.
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).
Impact and interest:
Citation counts are sourced monthly from and citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
|Item Type:||Journal Article|
|Keywords:||fructose; glucose; sucrose; carbohydrate, adult; article; bicycle; carbohydrate diet; electrolyte balance; exercise; human; male; metabolism; stomach emptying; controlled study; cycling; dehydration; feeding; fluid intake; gastrointestinal tract function; human experiment; normal human, Adult; Bicycling; Dietary Carbohydrates; Exercise; Fructose; Gastric Emptying; Glucose; Human; Male; Sucrose; Water-Electrolyte Balance|
|Divisions:||Current > Schools > School of Exercise & Nutrition Sciences|
|Deposited On:||07 Jul 2016 02:10|
|Last Modified:||07 Jul 2016 02:10|
Repository Staff Only: item control page