Combined effects of endurance training and dietary unsaturated fatty acids on physical performance, fat oxidation and insulin sensitivity.

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ID Serval
serval:BIB_E1B3A421807E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Combined effects of endurance training and dietary unsaturated fatty acids on physical performance, fat oxidation and insulin sensitivity.
Périodique
British Journal of Nutrition
Auteur⸱e⸱s
Boss Andreas, Lecoultre Virgile, Ruffieux Christiane, Tappy Luc, Schneiter Philippe
ISSN
1475-2662[electronic], 0007-1145[linking]
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
103
Numéro
8
Pages
1151-1159
Langue
anglais
Résumé
Endurance training improves exercise performance and insulin sensitivity, and these effects may be in part mediated by an enhanced fat oxidation. Since n-3 and n-9 unsaturated fatty acids may also increase fat oxidation, we hypothesised that a diet enriched in these fatty acids may enhance the effects of endurance training on exercise performance, insulin sensitivity and fat oxidation. To assess this hypothesis, sixteen normal-weight sedentary male subjects were randomly assigned to an isoenergetic diet enriched with fish and olive oils (unsaturated fatty acid group (UFA): 52 % carbohydrates, 34 % fat (12 % SFA, 12 % MUFA, 5 % PUFA), 14 % protein), or a control diet (control group (CON): 62 % carbohydrates, 24 % fat (12 % SFA, 6 % MUFA, 2 % PUFA), 14 % protein) and underwent a 10 d gradual endurance training protocol. Exercise performance was evaluated by measuring VO2max and the time to exhaustion during a cycling exercise at 80 % VO2max; glucose homeostasis was assessed after ingestion of a test meal. Fat oxidation was assessed by indirect calorimetry at rest and during an exercise at 50 % VO2max. Training significantly increased time to exhaustion, but not VO2max, and lowered incremental insulin area under the curve after the test meal, indicating improved insulin sensitivity. Those effects were, however, of similar magnitude in UFA and CON. Fat oxidation tended to increase in UFA, but not in CON. This difference was, however, not significant. It is concluded that a diet enriched with fish- and olive oil does not substantially enhance the effects of a short-term endurance training protocol in healthy young subjects.
Mots-clé
Adult, Blood Glucose/metabolism, Body Composition, Calorimetry, Indirect/methods, Diet, Exercise/physiology, Exercise Test, Fatty Acids, Nonesterified/blood, Fatty Acids, Unsaturated/pharmacology, Humans, Insulin/blood, Lactates/blood, Lipids/physiology, Male, Oxidation-Reduction, Oxygen Consumption/drug effects, Physical Endurance/drug effects, Young Adult
Pubmed
Web of science
Open Access
Oui
Création de la notice
06/02/2010 19:15
Dernière modification de la notice
14/02/2022 8:57
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