| Moderate exercise, postprandial energy expenditure, and substrate use in varying meals in lean and obese men. | |
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MedLine Citation:
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PMID: 18272934 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Maximizing postprandial energy expenditure and fat oxidation could be of clinical relevance for the treatment of obesity. This study investigated the effect of prior exercise on energy expenditure and substrate utilization after meals containing varying amounts of macronutrients. Eight lean (11.6%+/-4.0% body fat, M+/-SD) and 12 obese (35.9%+/-5.3% body fat) men were randomly assigned to a protein (43% protein, 30% carbohydrate) or a carbohydrate (10% protein, 63% carbohydrate) meal. The metabolic responses to the meals were investigated during 2 trials, when meals were ingested after a resting period (D) or cycling exercise (Ex+D; 65% of oxygen consumption reserve, 200 kcal). Energy expenditure, substrate utilization, and glucose and insulin responses were measured for 4 hr during the postprandial phase. Although postprandial energy expenditure was not affected by prior exercise, the total amount of fat oxidized was higher during Ex+D than during D (170.8+/-60.1 g vs. 137.8+/-50.8 g, p< .05), and, accordingly, the use of carbohydrate as substrate was decreased (136.4+/-45.2 g vs. 164.0+/-42.9 g, p< .05).After the protein meal fat-oxidation rates were higher than after carbohydrate intake (p< .05), an effect independent of prior exercise. Plasma insulin tended to be lower during Ex+D (p= .072) and after the protein meal (p= .066). No statistically significant change in postprandial blood glucose was induced by prior exercise. Exercising before meal consumption can result in a marked increase in fat oxidation, which is independent of the type of meal consumed. |
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Authors:
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Petra Stiegler; S Andrew Sparks; Adam Cunliffe |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: International journal of sport nutrition and exercise metabolism Volume: 18 ISSN: 1526-484X ISO Abbreviation: Int J Sport Nutr Exerc Metab Publication Date: 2008 Feb |
Date Detail:
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Created Date: 2008-02-14 Completed Date: 2008-04-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100939812 Medline TA: Int J Sport Nutr Exerc Metab Country: United States |
Other Details:
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Languages: eng Pagination: 66-78 Citation Subset: IM |
Affiliation:
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Dept. of Human and Health Sciences, University of Westminster, London, UK. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adipose Tissue
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metabolism* Adult Blood Glucose / analysis, metabolism Body Composition / physiology Cross-Over Studies Dietary Carbohydrates / administration & dosage, metabolism Dietary Fats / administration & dosage, metabolism Dietary Proteins / administration & dosage, metabolism Energy Metabolism / drug effects, physiology* Exercise / physiology* Humans Insulin / blood Male Obesity / metabolism* Oxygen Consumption Postprandial Period / physiology Thinness / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Blood Glucose; 0/Dietary Carbohydrates; 0/Dietary Fats; 0/Dietary Proteins; 11061-68-0/Insulin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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