| Effects of 3-week consumption of green tea extracts on whole-body metabolism during cycling exercise in endurance-trained men. | |
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MedLine Citation:
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PMID: 19839000 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The consumption of green tea has been generally associated with beneficial effects on human whole-body metabolism and recent investigations with animals indicate favorable effects of green tea extracts (GTE) on energy metabolism during exercise and aerobic exercise performance. Therefore, the purpose of this study was to examine the effects of a three-week supplementation with GTE on human energy metabolism during submaximal cycling exercise. In a randomized, double-blind crossover setting, ten healthy endurance-trained men exercised for 2 hours at 50 % W(max) before and after three weeks of placebo or GTE supplementation (GTE containing about 160 mg x day(-1) total catechins, of which about 70 mg x day(-1) was epigallocatechin-3-gallate). The GTE supplementation did not influence indices of fat and energy metabolism (fatty acids, 3-beta-hydroxybutyrate, triacylglycerol, low-density-lipoprotein cholesterol, total cholesterol, lactate, glucose, oxygen uptake, respiratory exchange ratio, energy expenditure), inflammation processes (interleukin-6, C-reactive protein), and oxidative stress (thiobarbituric-acid reactive substances, oxidized low-density-lipoprotein cholesterol), but plasma creatine kinase concentration at rest and during exercise was significantly lower (p = 0.039) and high-density-lipoprotein cholesterol concentration at rest was significantly higher (p = 0.043) compared to placebo. In conclusion, these results suggest only slight effects on whole-body metabolism after supplementation with GTE. |
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Authors:
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Philipp Eichenberger; Paolo C Colombani; Samuel Mettler |
Publication Detail:
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Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal for vitamin and nutrition research. Internationale Zeitschrift für Vitamin- und Ernährungsforschung. Journal international de vitaminologie et de nutrition Volume: 79 ISSN: 0300-9831 ISO Abbreviation: Int J Vitam Nutr Res Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2009-10-19 Completed Date: 2009-11-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1273304 Medline TA: Int J Vitam Nutr Res Country: Switzerland |
Other Details:
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Languages: eng Pagination: 24-33 Citation Subset: IM |
Affiliation:
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Institute of Human Movement Sciences and Sport, ETH Zurich, Switzerland. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adiposity Adult Analysis of Variance Bicycling Biological Markers / analysis Camellia sinensis / chemistry* Catechin / administration & dosage, analogs & derivatives*, analysis Cholesterol, HDL / blood Creatine Kinase / blood Cross-Over Studies Dietary Supplements Double-Blind Method Energy Metabolism* Exercise Test Humans Inflammation / metabolism Lipid Metabolism* Male Oxidative Stress Physical Endurance / physiology* Physical Exertion / physiology* Plant Extracts / administration & dosage*, chemistry Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 0/Cholesterol, HDL; 0/Plant Extracts; 154-23-4/Catechin; EC 2.7.3.2/Creatine Kinase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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