Effect of physical exercise on glycogen turnover and net substrate utilization according to the nutritional state.

Détails

ID Serval
serval:BIB_F7E782E8437B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Effect of physical exercise on glycogen turnover and net substrate utilization according to the nutritional state.
Périodique
American Journal of Physiology. Endocrinology and Metabolism
Auteur(s)
Schneiter P., Di Vetta V., Jéquier E., Tappy L.
ISSN
0193-1849 (Print)
ISSN-L
0002-9513
Statut éditorial
Publié
Date de publication
1995
Volume
269
Numéro
6 Pt 1
Pages
E1031-E1036
Langue
anglais
Résumé
To determine the metabolic effects of a single bout of exercise performed after a meal or in the fasting state, nine healthy subjects were studied over two 8-h periods during which net substrate oxidation was monitored by indirect calorimetry. On one occasion, exercise was performed 90 min after ingestion of a meal labeled with [U-13C]glucose [protocol meal-exercise (M-E)]. On the second occasion, exercise was performed after an overnight fast and was followed 30 min later by ingestion of an identical meal [protocol exercise-meal (E-M)]. Energy balances were similar in both protocols, but carbohydrate balance was positive (42.2 +/- 5.1 g), and lipid balance was negative (-11.1 +/- 2.0) during E-M, whereas they were nearly even during M-E. Total glycogen synthesis was calculated as carbohydrate intake minus oxidation of exogenous 13C-labeled carbohydrate (calculated from 13CO2 production). Total glycogen synthesis was increased by 90% (from 47.6 +/- 3.8 to 90.7 +/- 5.4 g, P < 0.0001) during E-M vs. M-E. Endogenous glycogen breakdown was calculated as net carbohydrate oxidation minus oxidation of exogenous carbohydrate and was increased by 44% (from 35.8 +/- 5.6 to 51.7 +/- 6.6 g, P < 0.004) during E-M. It is concluded that exercise performed in the fasting state stimulates glycogen turnover and fat oxidation.
Mots-clé
Adult, Calorimetry, Indirect, Carbohydrate Metabolism, Eating, Energy Metabolism, Fasting, Female, Glycogen/metabolism, Humans, Lipid Metabolism, Male, Nutritional Status, Oxidation-Reduction, Physical Exertion
Pubmed
Web of science
Création de la notice
24/01/2008 14:36
Dernière modification de la notice
03/03/2018 22:51
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