| Effects of 1 day of inactivity on insulin action in healthy men and women: interaction with energy intake. | |
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MedLine Citation:
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PMID: 21067784 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Prolonged periods of limited muscle activity can reduce insulin action. Acute changes in low muscle activity (ie, sitting) have not been assessed. In addition, unless energy intake is reduced during sitting to match low expenditure, the concurrent energy surplus may explain lower insulin action. The objective of the study was to evaluate the acute effect of sitting, with and without energy surplus, on insulin action. Fourteen young (26.1 ± 4.5 years, mean ± SD), nonobese (23.7% ± 7.1% fat), fit (peak oxygen consumption = 49.1 ± 3.3 mL·kg(-1)·min(-1)) men (n = 7) and women (n = 7) completed three 24-hour conditions: (1) an active, no-sitting condition (high energy expenditure of 2944 ± 124 kcal with energy intake matched to expenditure) = NO-SIT; (2) low energy expenditure (sitting) of 2195 ± 121 kcal with no reduction in energy intake (energy surplus) = SIT; and (3) sitting with energy intake reduced to 2139 ± 118 kcal to match low expenditure (energy balance) = SIT-BAL. Insulin action was measured the following morning during a continuous infusion of [6,6-(2)H]-glucose. Data were analyzed using linear mixed-effects models with planned contrasts. Compared with NO-SIT, insulin action, defined as whole-body rate of glucose disappearance normalized to mean plasma insulin, was reduced by 39% in SIT (P < .001) and by 18% in SIT-BAL (P = .07). Insulin action was higher in SIT-BAL compared with SIT (P = .04). One day of sitting considerably reduced insulin action; this effect was minimized, but not prevented, when energy intake was reduced to match expenditure. Strategies to limit daily sitting may reduce metabolic disease risk. |
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Authors:
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Brooke R Stephens; Kirsten Granados; Theodore W Zderic; Marc T Hamilton; Barry Braun |
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Publication Detail:
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Type: Journal Article Date: 2010-11-10 |
Journal Detail:
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Title: Metabolism: clinical and experimental Volume: 60 ISSN: 1532-8600 ISO Abbreviation: Metab. Clin. Exp. Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-06-20 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375267 Medline TA: Metabolism Country: United States |
Other Details:
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Languages: eng Pagination: 941-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Elsevier Inc. All rights reserved. |
Affiliation:
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Energy Metabolism Laboratory, Department of Kinesiology, University of Massachusetts Amherst, Amherst, MA 01003, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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