| The myths surrounding pre-exercise carbohydrate feeding. | |
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MedLine Citation:
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PMID: 21346333 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Background/Aims: Carbohydrate ingested 30-60 min before exercise may result in hypoglycaemia during exercise, a phenomenon often called rebound or reactive hypoglycaemia. There is considerable confusion regarding pre-exercise carbohydrate feeding with advice that ranges from 'consume carbohydrate in the hour before exercise' to 'avoid carbohydrate in the 60 min prior to exercise'. Methods: We analysed the studies available in the literature to draw conclusions about the use of carbohydrate in the pre-exercise period. Results: Without performing a meta-analysis, it is clear that the risk of reduced performance is minimal as almost all studies point towards unaltered or even improved performance. This is despite the rather large metabolic changes that occur in response to pre-exercise carbohydrate feeding. Conclusion: It can be concluded that advice to avoid carbohydrate feeding in the hour before exercise is unfounded. Nevertheless athletes may develop symptoms similar to those of hypoglycaemia, even though they are rarely linked to actual low glucose concentrations. An individual approach may therefore be necessary to minimize these symptoms even though they do not appear to be related to exercise performance. |
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Authors:
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Asker E Jeukendrup; Sophie C Killer |
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Publication Detail:
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Type: Journal Article Date: 2011-02-22 |
Journal Detail:
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Title: Annals of nutrition & metabolism Volume: 57 Suppl 2 ISSN: 1421-9697 ISO Abbreviation: Ann. Nutr. Metab. Publication Date: 2010 |
Date Detail:
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Created Date: 2011-02-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8105511 Medline TA: Ann Nutr Metab Country: Switzerland |
Other Details:
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Languages: eng Pagination: 18-25 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 S. Karger AG, Basel. |
Affiliation:
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School of Sport and Exercise Sciences, University of Birmingham, Birmingham, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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