| Effects of post-absorptive and postprandial exercise on 24h fat oxidation. | |
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MedLine Citation:
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PMID: 23313101 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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OBJECTIVE: Fat oxidation during exercise depends on nutritional state, and exercise performed in the post-absorptive state oxidizes more fat than that performed in the postprandial state. However, the effects of exercise on energy metabolism continue during the post-exercise period, and the difference in fat oxidation during exercise may be compensated for during the post-exercise period. The present study compared the effects of an acute exercise bout in the post-absorptive or postprandial state on 24h fat oxidation. METHODS: Twelve young male athletes stayed twice in a room-size metabolic chamber for 24h indirect calorimetry in a randomized repeated-measure design. Before or after breakfast, i.e. in the post-absorptive or postprandial state, subjects exercised at 50% VO(2) max for 60min. RESULTS: During the 60min of exercise, energy expenditure in the two exercise trials were equivalent, but exercise in the post-absorptive state was performed with lower RQ compared with that in the postprandial state (P<0.01). The time of exercise relative to breakfast did not affect 24h energy expenditure (P>0.5). However, accumulated 24h fat oxidation was higher (P<0.05) and that of carbohydrate oxidation was lower (P<0.05) when exercise was performed in the post-absorptive state. CONCLUSIONS: Compared with exercise performed in the postprandial state, exercise performed in the post-absorptive state oxidized more fat and saved more carbohydrate in the body, without affecting 24h energy expenditure. |
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Authors:
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Kenshiro Shimada; Yuki Yamamoto; Kaito Iwayama; Kazuteru Nakamura; Sachiko Yamaguchi; Masanobu Hibi; Yoshiharu Nabekura; Kumpei Tokuyama |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-10 |
Journal Detail:
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Title: Metabolism: clinical and experimental Volume: - ISSN: 1532-8600 ISO Abbreviation: Metab. Clin. Exp. Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375267 Medline TA: Metabolism Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Elsevier Inc. All rights reserved. |
Affiliation:
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Doctoral Program in Sports Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba, Ibaraki, Japan 305-8574. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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