| Combined effects of endurance training and dietary unsaturated fatty acids on physical performance, fat oxidation and insulin sensitivity. | |
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MedLine Citation:
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PMID: 19948079 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Andreas Boss; Virgile Lecoultre; Christiane Ruffieux; Luc Tappy; Philippe Schneiter |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't Date: 2009-12-01 |
Journal Detail:
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Title: The British journal of nutrition Volume: 103 ISSN: 1475-2662 ISO Abbreviation: Br. J. Nutr. Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-04-13 Completed Date: 2010-04-30 Revised Date: 2010-07-14 |
Medline Journal Info:
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Nlm Unique ID: 0372547 Medline TA: Br J Nutr Country: England |
Other Details:
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Languages: eng Pagination: 1151-9 Citation Subset: IM |
Affiliation:
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Department of Physiology, University of Lausanne, Lausanne, Switzerland. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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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 |
| Chemical | |
Reg. No./Substance:
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0/Blood Glucose; 0/Fatty Acids, Nonesterified; 0/Fatty Acids, Unsaturated; 0/Lactates; 0/Lipids; 11061-68-0/Insulin |
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