| The effects of postexercise consumption of high-molecular-weight versus low-molecular-weight carbohydrate solutions on subsequent high-intensity interval-running capacity. | |
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MedLine Citation:
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PMID: 20975104 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of this study was to determine the effects of postexercise ingestion of different-molecular-weight glucose polymer solutions on subsequent high-intensity interval-running capacity. In a repeated-measures design, 6 men ran for 60 min in the morning at 70% VO2max. Immediately post- and at 1 and 2 hr postexercise, participants consumed a 15% low-molecular-weight (LMW) or high-molecular-weight (HMW) carbohydrate solution, at a rate of 1.2 g of carbohydrate/kg body mass, or an equivalent volume of flavored water (WAT). After recovery, participants performed repeated 1-min intervals at 90% VO2max interspersed with 1 min active recovery (walking) until volitional exhaustion. Throughout the 3-hr recovery period, plasma glucose concentrations were higher (p=.002) during the HMW and LMW conditions than with WAT (M 7.0±0.8, 7.5±1.0, and 5.6±0.2 mmol/L, respectively), although there was no difference (p=.723) between HMW and LMW conditions. Exercise capacity was 13 (43±10 min; 95% CI for differences: 8-18; p=.001) and 11 min (41±9 min; 95% CI for differences; 2-18: p=.016) longer with HMW and LMW solutions, respectively, than with WAT (30±9 min). There was no substantial difference (2 min; 95% CI for differences: -5 to 10; p=.709) in exercise capacity between LMW and HMW solutions. Although this magnitude of difference is most likely trivial in nature, the uncertainty allows for a possible small substantial enhancement of physiological significance, and further research is required to clarify the true nature of the effect. |
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Authors:
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Chris McGlory; James P Morton |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial |
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 Oct |
Date Detail:
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Created Date: 2010-10-26 Completed Date: 2010-11-23 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: 361-9 Citation Subset: IM |
Affiliation:
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Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Beverages Blood Glucose / metabolism* Cross-Over Studies Dietary Carbohydrates / administration & dosage, pharmacokinetics* Double-Blind Method Humans Male Molecular Weight Muscle, Skeletal / metabolism Oxygen Consumption Physical Exertion / physiology* Running / physiology* Task Performance and Analysis Water Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Blood Glucose; 0/Dietary Carbohydrates; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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