| The influence of caffeine and carbohydrate coingestion on simulated soccer performance. | |
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MedLine Citation:
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PMID: 20601736 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Carbohydrate and caffeine are known to independently improve certain aspects of athletic performance. However, less is understood about physiological and performance outcomes when these compounds are coingested in a rehydration and carbohydrate-replacement strategy. The aim of this study was to examine the influence of adding a moderate dose of caffeine to a carbohydrate solution during prolonged soccer activity. Fifteen male soccer players performed two 90-min intermittent shuttle-running trials. They ingested a carbohydrate-electrolyte solution (CON) providing a total of 1.8 g/kg body mass (BM) of carbohydrate or a similar solution with added caffeine (CAF; 3.7 mg/kg BM). Solutions were ingested 1 hr before exercise and every 15 min during the protocol. Soccer passing skill and countermovement-jump height (CMJ) were quantified before exercise and regularly during exercise. Sprinting performance, heart rate, blood lactate concentration (La) and the subjective experiences of participants were measured routinely. Mean 15-m sprint time was faster during CAF (p = .04); over the final 15 min of exercise mean sprint times were CAF 2.48 +/- 0.15 s vs. CON 2.59 +/- 0.2 s. Explosive leg power (CMJ) was improved during CAF (52.9 +/- 5.8 vs. CON 51.7 +/- 5.7 cm, p = .03). Heart rate was elevated throughout CAF, and ratings of pleasure were significantly enhanced. There were no significant differences in passing skill, rating of perceived exertion, La, or body-mass losses between trials. The addition of caffeine to the carbohydrate-electrolyte solution improved sprinting performance, countermovement jumping, and the subjective experiences of players. Caffeine appeared to offset the fatigue-induced decline in self-selected components of performance. |
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Authors:
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Nicholas Gant; Ajmol Ali; Andrew Foskett |
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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 Jun |
Date Detail:
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Created Date: 2010-07-05 Completed Date: 2010-09-23 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: 191-7 Citation Subset: IM |
Affiliation:
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Dept. of Sport and Exercise Science, University of Auckland, Auckland, New Zealand. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Adult Athletic Performance / physiology Caffeine / administration & dosage, pharmacology* Central Nervous System Stimulants / administration & dosage, pharmacology* Cross-Over Studies Dietary Carbohydrates / administration & dosage, pharmacology* Double-Blind Method Drug Synergism Heart Rate / drug effects, physiology Humans Lactates / blood Male Soccer / physiology* Task Performance and Analysis Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Central Nervous System Stimulants; 0/Dietary Carbohydrates; 0/Lactates; 58-08-2/Caffeine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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