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High-velocity intermittent running: effects of beta-alanine supplementation.
MedLine Citation:
PMID:  22797003     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
ABSTRACT: The use of β-alanine in sport is widespread. However, the effects across all sport activities are inconclusive. The purpose of this study was to evaluate the effects of β-alanine supplementation on high-intensity running performance and critical velocity (CV) and anaerobic running capacity (ARC). Fifty-recreationally trained men and were randomly assigned, in a double-blind fashion, to a β-alanine (BA, 2 × 800 mg tabs, 3 × daily; CarnoSyn; n=26) or placebo (PL, 2 x 800 mg maltodextrin tabs, 3 × daily; n=24) group. A graded exercise test (GXT) was performed to establish peak velocity (PV). Three high-speed runs to exhaustion were conducted at 110, 100, and 90% of PV, with 15 min of rest between bouts. The distances achieved were plotted over the times-to-exhaustion (TTE). Linear regression was used to determine the slope (CV) and y-intercept (ARC) of these relationships to assess aerobic and anaerobic performances, respectively. There were no significant treatment effects (p>0.05) on CV or ARC, for either men or women. Additionally, no TTE effects were evident for bouts at 90-110PV lasting 1.95-5.06 min. There seems to be no ergogenic effect of β-alanine supplementation on CV, ARC, or high-intensity running lasting approximately 2-5 min, in either men or women in the current study.
Authors:
Abbie E Smith-Ryan; David H Fukuda; Jeffrey R Stout; Kristina L Kendall
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-12
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Applied Physiology Laboratory, Department of Exercise and Sport Science, University of North Carolina Chapel Hill, Chapel Hill, NC 27599 2Department of Exercise Science, Creighton University, Omaha, NE 68178 3Sport and Exercise Science Program, University of Central Florida, Orlando, FL 32816 4Metabolic and Body Composition Laboratory, Department of Health and Exercise Science, University of Oklahoma, Norman, OK 73019.
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