| The effect of acute taurine ingestion on endurance performance and metabolism in well-trained cyclists. | |
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MedLine Citation:
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PMID: 20739720 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This study examined whether acute taurine (T) ingestion before prolonged cycling would improve time-trial (TT) performance and alter whole-body fuel utilization compared with a control (CON) trial and a placebo (PL) trial in which participants were told they received taurine but did not. Eleven endurance-trained male cyclists (27.2 ± 1.5 yr, 74.3 ± 2.3 kg, 59.9 ± 2.3 ml · kg⁻¹ · min⁻¹; M ± SEM) completed 3 trials in a randomized, crossover, blinded design in which they consumed a noncaloric sweetened beverage with either 1.66 g of T or nothing added (CON, PL) 1 hr before exercise. Participants then cycled at 66.5% ± 1.9% VO(2max) for 90 min followed immediately by a TT (doing 5 kJ of work/kg body mass as fast as possible). Data on fluid administration, expired gas, heart rate, and ratings of perceived exertion were collected at 15-min intervals during the 90-min cycling ride, but there were no differences recorded between trials. There was no difference in TT performance between any of the 3 trials (1,500 ± 87 s). Average carbohydrate (T 2.73 ± 0.21, CON 2.88 ± 0.19, PL 2.89 ± 0.20 g/min) and fat (T 0.45 ± 0.05, CON 0.39 ± 0.04, PL 0.39 ± 0.05 g/min) oxidation rates were unaffected by T supplementation. T ingestion resulted in a 16% increase (5 g, ~84 kJ; p < .05) in total fat oxidation over the 90-min exercise period compared with CON and PL. The acute ingestion of 1.66 g of T before exercise did not enhance TT performance but did result in a small but significant increase in fat oxidation during submaximal cycling in endurance-trained cyclists. |
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Authors:
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Jane A Rutherford; Lawrence L Spriet; Trent Stellingwerff |
Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of sport nutrition and exercise metabolism Volume: 20 ISSN: 1526-484X ISO Abbreviation: Int J Sport Nutr Exerc Metab Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-26 Completed Date: 2010-11-02 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: 322-9 Citation Subset: IM |
Affiliation:
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Dept. of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Bicycling / physiology* Cross-Over Studies Dietary Supplements Double-Blind Method Energy Metabolism / drug effects*, physiology Humans Male Oxygen Consumption / drug effects, physiology Physical Endurance / drug effects*, physiology Taurine / pharmacology* |
| Chemical | |
Reg. No./Substance:
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107-35-7/Taurine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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