Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/12758
Appears in Collections:Faculty of Health Sciences and Sport Journal Articles
Peer Review Status: Refereed
Title: Influence of the glycaemic index of an evening meal on substrate oxidation following breakfast and during exercise the next day in healthy women
Authors: Stevenson, Emma J
Williams, Clyde D H
Nute, Maria G G
Humphrey, Lauren
Witard, Oliver
Contact Email: oliver.witard@stir.ac.uk
Keywords: second-meal effect
glycaemic index
exercise
women
Issue Date: May-2008
Publisher: Nature Publishing Group
Citation: Stevenson EJ, Williams CDH, Nute MGG, Humphrey L & Witard O (2008) Influence of the glycaemic index of an evening meal on substrate oxidation following breakfast and during exercise the next day in healthy women, European Journal of Clinical Nutrition, 62 (5), pp. 608-616.
Abstract: OBJECTIVE: To investigate whether the 'overnight second-meal effect' results in altered substrate oxidation during the postprandial period following breakfast and subsequent sub-maximal exercise in women. SUBJECTS/METHODS: Seven recreationally active women were recruited for the study. In each trial, participants were provided with their evening meal on day 1, which was composed of either high glycaemic index (HGI) or low glycaemic index (LGI) carbohydrates (CHO). On day 2, participants were provided with a standard HGI breakfast and then performed a 60 min run at 65% \[V.]O(2 max) 3 h later. RESULTS: The incremental area under the curve (IAUC) for plasma glucose concentrations during the postprandial period following breakfast was greater in the HGI trial compared to the LGI trial (P less than 0.01). Similarly, the IAUC for serum insulin concentrations was greater in the HGI trial than the LGI trial (P less than 0.05). No differences in plasma free-fatty acids (FFA) or plasma glycerol concentrations were found between trials during the postprandial period. During subsequent exercise, there were no significant differences in substrate metabolism. CONCLUSION: The glycaemic index of an evening meal does not alter substrate oxidation at rest following breakfast or during subsequent submaximal exercise in women. This study provides further evidence for the overnight second-meal effect on glycaemic responses following a LGI mixed evening meal.
Type: Journal Article
URI: http://hdl.handle.net/1893/12758
DOI Link: http://dx.doi.org/10.1038/sj.ejcn.1602759
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Northumbria University
Loughborough University
Loughborough University
Leeds Metropolitan University
Sport

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