Document Detail

Effect of oral administration of sodium bicarbonate on surface EMG activity during repeated cycling sprints.
MedLine Citation:
PMID:  17628824     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to determine the effect of oral administration of sodium bicarbonate (NaHCO3) on surface electromyogram (SEMG) activity from the vastus lateralis (VL) during repeated cycling sprints (RCS). Subjects performed two RCS tests (ten 10-s sprints) interspersed with both 30-s and 360-s recovery periods 1 h after oral administration of either NaHCO3 (RCSAlk) or CaCO3 (RCSPla) in a random counterbalanced order. Recovery periods of 360 s were set before the 5th and 9th sprints. The rate of decrease in plasma HCO3- concentration during RCS was significantly greater in RCSAlk than in RCSPla, but the rates of decline in blood pH during the two RCS tests were similar. There was no difference between change in plasma lactate concentration in RCSAlk and that in RCSPla. Performance during RCSAlk was similar to that during RCSPla. There were no differences in oxygen uptake immediately before each cycling sprint (preVO2) and in SEMG activity between RCSAlk and RCSPla. In conclusion, oral administration of NaHCO3 did not affect SEMG activity from the VL. This suggests that the muscle recruitment strategy during RCS is not determined by only intramuscular pH.
Ryouta Matsuura; Takuma Arimitsu; Takehide Kimura; Takahiro Yunoki; Tokuo Yano
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Publication Detail:
Type:  Journal Article; Randomized Controlled Trial     Date:  2007-07-13
Journal Detail:
Title:  European journal of applied physiology     Volume:  101     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2007 Nov 
Date Detail:
Created Date:  2007-09-27     Completed Date:  2008-02-20     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  409-17     Citation Subset:  IM    
Laboratory of Exercise Physiology, Graduate School of Education, Hokkaido University, Kita-11, Nishi-7, Kita-ku, Sapporo, 060-0811, Japan.
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MeSH Terms
Alkalosis / prevention & control
Bicycling / physiology*
Blood Gas Analysis
Body Mass Index
Exercise Test
Hydrogen-Ion Concentration
Lactic Acid / blood
Muscle Fatigue / drug effects,  physiology
Muscle, Skeletal / drug effects*,  physiology*
Oxygen Consumption / drug effects,  physiology
Phosphocreatine / metabolism
Sodium / blood
Sodium Bicarbonate / blood,  pharmacology*
Reg. No./Substance:
144-55-8/Sodium Bicarbonate; 50-21-5/Lactic Acid; 67-07-2/Phosphocreatine; 7440-23-5/Sodium

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