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Effect of drink carbohydrate content on postexercise gastric emptying, rehydration, and the calculation of net fluid balance.
Int J Sport Nutr Exerc Metab. 2014 Feb; 24(1):79-89.IJ

Abstract

The purpose of this study was to examine the gastric emptying and rehydration effects of hypotonic and hypertonic glucose-electrolyte drinks after exercise-induced dehydration. Eight healthy males lost ~1.8% body mass by intermittent cycling and rehydrated (150% of body mass loss) with a hypotonic 2% (2% trial) or a hypertonic 10% (10% trial) glucose-electrolyte drink over 60 min. Blood and urine samples were taken at preexercise, postexercise, and 60, 120, 180, and 240 min postexercise. Gastric and test drink volume were determined 15, 30, 45, 60, 90, and 120 min postexercise. At the end of the gastric sampling period 0.3% (2% trial) and 42.1% (10% trial; p < .001) of the drinks remained in the stomach. Plasma volume was lower (p < .01) and serum osmolality was greater (p < .001) at 60 and 120 min during the 10% trial. At 240 min, 52% (2% trial) and 64% (10% trial; p < .001) of the drinks were retained. Net fluid balance was greater from 120 min during the 10% trial (p < .001). When net fluid balance was corrected for the volume of fluid in the stomach, it was greater at 60 and 120 min during the 2% trial (p < .001). These results suggest that the reduced urine output following ingestion of a hypertonic rehydration drink might be mediated by a slower rate of gastric emptying, but the slow gastric emptying of such solutions makes rehydration efficiency difficult to determine in the hours immediately after drinking, compromising the calculation of net fluid balance.

Authors+Show Affiliations

School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.No affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article

Language

eng

PubMed ID

23980237

Citation

Clayton, David J., et al. "Effect of Drink Carbohydrate Content On Postexercise Gastric Emptying, Rehydration, and the Calculation of Net Fluid Balance." International Journal of Sport Nutrition and Exercise Metabolism, vol. 24, no. 1, 2014, pp. 79-89.
Clayton DJ, Evans GH, James LJ. Effect of drink carbohydrate content on postexercise gastric emptying, rehydration, and the calculation of net fluid balance. Int J Sport Nutr Exerc Metab. 2014;24(1):79-89.
Clayton, D. J., Evans, G. H., & James, L. J. (2014). Effect of drink carbohydrate content on postexercise gastric emptying, rehydration, and the calculation of net fluid balance. International Journal of Sport Nutrition and Exercise Metabolism, 24(1), 79-89. https://doi.org/10.1123/ijsnem.2013-0024
Clayton DJ, Evans GH, James LJ. Effect of Drink Carbohydrate Content On Postexercise Gastric Emptying, Rehydration, and the Calculation of Net Fluid Balance. Int J Sport Nutr Exerc Metab. 2014;24(1):79-89. PubMed PMID: 23980237.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of drink carbohydrate content on postexercise gastric emptying, rehydration, and the calculation of net fluid balance. AU - Clayton,David J, AU - Evans,Gethin H, AU - James,Lewis J, Y1 - 2013/08/26/ PY - 2013/8/28/entrez PY - 2013/8/28/pubmed PY - 2014/12/15/medline SP - 79 EP - 89 JF - International journal of sport nutrition and exercise metabolism JO - Int J Sport Nutr Exerc Metab VL - 24 IS - 1 N2 - The purpose of this study was to examine the gastric emptying and rehydration effects of hypotonic and hypertonic glucose-electrolyte drinks after exercise-induced dehydration. Eight healthy males lost ~1.8% body mass by intermittent cycling and rehydrated (150% of body mass loss) with a hypotonic 2% (2% trial) or a hypertonic 10% (10% trial) glucose-electrolyte drink over 60 min. Blood and urine samples were taken at preexercise, postexercise, and 60, 120, 180, and 240 min postexercise. Gastric and test drink volume were determined 15, 30, 45, 60, 90, and 120 min postexercise. At the end of the gastric sampling period 0.3% (2% trial) and 42.1% (10% trial; p < .001) of the drinks remained in the stomach. Plasma volume was lower (p < .01) and serum osmolality was greater (p < .001) at 60 and 120 min during the 10% trial. At 240 min, 52% (2% trial) and 64% (10% trial; p < .001) of the drinks were retained. Net fluid balance was greater from 120 min during the 10% trial (p < .001). When net fluid balance was corrected for the volume of fluid in the stomach, it was greater at 60 and 120 min during the 2% trial (p < .001). These results suggest that the reduced urine output following ingestion of a hypertonic rehydration drink might be mediated by a slower rate of gastric emptying, but the slow gastric emptying of such solutions makes rehydration efficiency difficult to determine in the hours immediately after drinking, compromising the calculation of net fluid balance. SN - 1543-2742 UR - https://www.unboundmedicine.com/medline/citation/23980237/Effect_of_drink_carbohydrate_content_on_postexercise_gastric_emptying_rehydration_and_the_calculation_of_net_fluid_balance_ L2 - https://journals.humankinetics.com/doi/10.1123/ijsnem.2013-0024 DB - PRIME DP - Unbound Medicine ER -