| Carbohydrate-electrolyte feedings improve 1 h time trial cycling performance. | |
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MedLine Citation:
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PMID: 9081269 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Carbohydrate-electrolyte (CE) feedings have been shown to improve endurance performance at moderate intensities (60-75% VO2max) and or more than 2 h duration. The effects of CE feedings during high intensity exercise (i.e. > or = 80% VO2 max) of shorter duration (approximately 1 h) are less clear. Therefore the purpose of the present study was to investigate the effect of the ingestion of a 7.6% CE solution during exercise on time trial cycling performance of approximately 1 h. This type of performance testing has been shown to be more reproducible (coefficient of variation 3.35%) than the traditional exercise test to exhaustion. On two occasions and in random order nineteen endurance trained cyclists completed an exercise test requiring the accomplishment of a set amount of work as fast as possible (time trial) under strictly standardized conditions. As the start and during the trials they drank in total 14 ml/kg of either a 7.6% CE solution or artificially flavored and colored water (placebo). Time to complete the set amount of work was significantly reduced and thus performance was significantly increase (p < 0.001) with the CE drink by 2.3%. Time to complete the set amount of work was 58.74 +/- 0.52 min with CE and 60.15 +/- 0.65 min with placebo (p < 0.001). Average workload during the time trials was 297.5 +/- 1.4W and 291.0 +/- 10.3 W, respectively. Subjects exercised at 76.4 +/- 0.7% of their maximal work rate (Wmax) with CE and at 74.8% Wmax with placebo (p < 0.001). It was concluded tht also in relative short term (1h) high intensity (75% Wmax) cycling exercise ingestion of a carbohydrate-electrolyte solution compared to placebo improves performance. |
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Authors:
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A Jeukendrup; F Brouns; A J Wagenmakers; W H Saris |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: International journal of sports medicine Volume: 18 ISSN: 0172-4622 ISO Abbreviation: Int J Sports Med Publication Date: 1997 Feb |
Date Detail:
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Created Date: 1997-06-03 Completed Date: 1997-06-03 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8008349 Medline TA: Int J Sports Med Country: GERMANY |
Other Details:
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Languages: eng Pagination: 125-9 Citation Subset: IM |
Affiliation:
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Department of Human Biology, Maastricht University, The Netherlands. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Beverages* Bicycling / physiology* Diet Dietary Carbohydrates / administration & dosage*, pharmacology Electrolytes / administration & dosage*, pharmacology Energy Intake Exercise Test Female Humans Male Motor Activity / drug effects Oxygen Consumption Physical Endurance / drug effects Placebos Reproducibility of Results Time Factors Work |
| Chemical | |
Reg. No./Substance:
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0/Dietary Carbohydrates; 0/Electrolytes; 0/Placebos |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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