Document Detail


Effect of blood lactate concentration and the level of oxygen uptake immediately before a cycling sprint on neuromuscular activation during repeated cycling sprints.
MedLine Citation:
PMID:  16891756     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The purpose of this study was to determine whether neuromuscular activation is affected by blood lactate concentration (La) and the level of oxygen uptake immediately before a cycling sprint (preVO(2)). The tests consisted of ten repeated cycling sprints for 10 sec with 35-sec (RCS(35)) and 350-sec recovery periods (RCS(350)). Peak power output (PPO) was not significantly changed despite an increase in La concentration up to 12 mmol/L in RCS(350). Mean power frequency (MPF) of the power spectrum calculated from a surface electromyogram on the vastus lateralis showed a significantly higher level in RCS(350). In RCS(35), preVO(2) level and La were higher than those in RCS(350) in the initial stage of the RCS and in the last half of the RCS, respectively. Thus, neuromuscular activation during exercise with maximal effort is affected by blood lactate concentration and the level of oxygen uptake immediately before exercise, suggesting a cyclic system between muscle recruitment pattern and muscle metabolites.
Authors:
Ryouta Matsuura; Hisayoshi Ogata; Takahiro Yunoki; Takuma Arimitsu; Tokuo Yano
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of physiological anthropology     Volume:  25     ISSN:  1880-6791     ISO Abbreviation:  -     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-08-07     Completed Date:  2006-09-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101269653     Medline TA:  J Physiol Anthropol     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  267-73     Citation Subset:  IM    
Affiliation:
Laboratory of Exercise Physiology, Graduate School of Education, Hokkaido University, Sapporo, Japan. dr-ryota@edu.hokudai.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Adult
Bicycling / physiology*
Electromyography
Exercise / physiology*
Fatigue / metabolism
Humans
Lactic Acid / blood*
Male
Muscle Fatigue / physiology
Muscle, Skeletal / physiology*
Oxygen Consumption / physiology*
Random Allocation
Chemical
Reg. No./Substance:
50-21-5/Lactic Acid

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


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