The University of Southampton
University of Southampton Institutional Repository

Exogenous carbohydrate oxidation from drinks ingested during prolonged exercise in a cold environment in humans

Galloway, Stuart D.R., Wootton, Steve A., Murphy, Jane L. and Maughan, Ronald J. (2001) Exogenous carbohydrate oxidation from drinks ingested during prolonged exercise in a cold environment in humans Journal of Applied Physiology, 91, (2), pp. 654-660.

Record type: Article


Six healthy male volunteers performed four rides to exhaustion on a cycle ergometer at ~80% of maximal oxygen consumption. Subjects ingested a bolus volume of fluid (7.14 ml/kg) immediately before exercise and additional fluid volumes (1.43 ml/kg) every 10 min during exercise. The fluids ingested were either a flavored water control or glucose-electrolyte beverages with glucose concentrations of 2, 6, or 12%. The beverages were labeled with [U-13C]glucose (99.2%: 0.05 g/l). Exercise capacity was not different (P = 0.13) between trials; median (range) exercise time was 83.52 (79.85-89.68), 103.19 (78.82-108.22), 100.37 (80.60-124.07), and 94.76 (76.78-114.25) min in the 0, 2, 6, and 12% trials, respectively. The oxidation of exogenous glucose in each 15-min period was significantly lower in the 2% trial (P = 0.02) than in the 6 and 12% trials where oxidation rates were between 0.5 and 0.7 g/min. No difference in endogenous glucose oxidation was observed between trials (P = 0.71). These findings indicate that the oxidation of exogenous glucose during exercise of this intensity and duration in a cold environment is similar to that observed in warmer conditions. Thus a low oxidation of exogenous substrate is unlikely to be a factor limiting the effectiveness of carbohydrate-electrolyte drink ingestion on exercise capacity in a cold environment.

Full text not available from this repository.

More information

Published date: 2001
Keywords: stable isotopes, hydration, glucose oxidation


Local EPrints ID: 25525
ISSN: 8750-7587
PURE UUID: dc2e92df-53dd-4b10-a1fe-4404d119e4d6

Catalogue record

Date deposited: 07 Apr 2006
Last modified: 17 Jul 2017 16:10

Export record


Author: Stuart D.R. Galloway
Author: Jane L. Murphy
Author: Ronald J. Maughan

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.