Document Detail


Dietary antioxidant supplementation combined with quercetin improves cycling time trial performance.
MedLine Citation:
PMID:  17136942     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigated whether 6 wk of antioxidant supplementation (AS) would enhance 30 km time trial (TT) cycling performance. Eleven elite male cyclists completed a randomized, double-blind, cross-over study to test the effects of twice daily AS containing essential vitamins plus quercetin (FRS), and AS minus quercetin (FRS-Q) versus a baseline TT (B). MANOVA analysis showed that time to complete the 30 km TT was improved by 3.1% on FRS compared to B (P < 0.01), and by 2% over the last 5 km (P < 0.05). Absolute and relative (%HRmax) heart rates and percent VO2max were not different between trials, but average and relative power (% peak power) was higher on FRS (P < or = 0.01). Rates of carbohydrate and fat oxidation were not different between trials. Thus, FRS supplementation significantly improved high-intensity cycling TT performance through enhancement of power output. Further study is needed to determine the potential mechanism(s) of the antioxidant efficacy.
Authors:
Holden S H MacRae; Kari M Mefferd
Publication Detail:
Type:  Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of sport nutrition and exercise metabolism     Volume:  16     ISSN:  1526-484X     ISO Abbreviation:  Int J Sport Nutr Exerc Metab     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-12-01     Completed Date:  2006-12-21     Revised Date:  2007-01-17    
Medline Journal Info:
Nlm Unique ID:  100939812     Medline TA:  Int J Sport Nutr Exerc Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  405-19     Citation Subset:  IM    
Affiliation:
Dept. of Sports Medicine, Pepperdine University, Malibu, CA 90263, USA.
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MeSH Terms
Descriptor/Qualifier:
Adult
Analysis of Variance
Antioxidants / administration & dosage*
Bicycling
Cross-Over Studies
Dietary Supplements
Double-Blind Method
Drug Synergism
Heart Rate / physiology
Humans
Male
Oxygen Consumption / physiology
Physical Endurance / drug effects*,  physiology*
Quercetin / administration & dosage*
Chemical
Reg. No./Substance:
0/Antioxidants; 117-39-5/Quercetin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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