Differences in whole-body fat oxidation kinetics between cycling and running.
Détails
Etat: Public
Version: Final published version
Licence: Non spécifiée
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
ID Serval
serval:BIB_270D724BA7C6
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Differences in whole-body fat oxidation kinetics between cycling and running.
Périodique
European Journal of Applied Physiology
ISSN
1439-6327 (Electronic)
ISSN-L
1439-6319
Statut éditorial
Publié
Date de publication
2010
Volume
109
Numéro
6
Pages
1037-1045
Langue
anglais
Résumé
This study aimed to quantitatively describe and compare whole-body fat oxidation kinetics in cycling and running using a sinusoidal mathematical model (SIN). Thirteen moderately trained individuals (7 men and 6 women) performed two graded exercise tests, with 3-min stages and 1 km h(-1) (or 20 W) increment, on a treadmill and on a cycle ergometer. Fat oxidation rates were determined using indirect calorimetry and plotted as a function of exercise intensity. The SIN model, which includes three independent variables (dilatation, symmetry and translation) that account for main quantitative characteristics of kinetics, provided a mathematical description of fat oxidation kinetics and allowed for determination of the intensity (Fat(max)) that elicits maximal fat oxidation (MFO). While the mean fat oxidation kinetics in cycling formed a symmetric parabolic curve, the mean kinetics during running was characterized by a greater dilatation (i.e., widening of the curve, P < 0.001) and a rightward asymmetry (i.e., shift of the peak of the curve to higher intensities, P = 0.01). Fat(max) was significantly higher in running compared with cycling (P < 0.001), whereas MFO was not significantly different between modes of exercise (P = 0.36). This study showed that the whole-body fat oxidation kinetics during running was characterized by a greater dilatation and a rightward asymmetry compared with cycling. The greater dilatation may be mainly related to the larger muscle mass involved in running while the rightward asymmetry may be induced by the specific type of muscle contraction.
Mots-clé
Adipose Tissue/physiology, Adult, Bicycling/physiology, Female, Humans, Kinetics, Male, Metabolic Clearance Rate, Oxygen/metabolism, Oxygen Consumption/physiology, Running/physiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
12/03/2010 11:25
Dernière modification de la notice
14/02/2022 8:54