Document Detail


Median power frequency of the surface electromyogram and blood lactate concentration in incremental cycle ergometry.
MedLine Citation:
PMID:  9118974     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The electromyogram (EMG) median power frequency of the vastus lateralis and flexor digitorum superficialis muscles was measured in 12 subjects during cycle ergometry with step-wise increasing exercise intensities up to 100% of VO2max. Blood lactate concentration was measured to investigate the relationship between changes in lactate concentration and shifts in the EMG median power frequency of exercising vastus lateralis and non-exercising flexor digitorum superficialis muscles. The results indicated that lactate concentration did not systematically affect median frequency: in spite of a considerable increase in blood lactate concentration, no systematic decrease of the median frequency during exercise was found, either for the vastus lateralis or for the flexor digitorum superficialis muscles. Instead of a decrease of the median frequency during exercise, as seen in isometrical protocols, an increase was seen in most subjects. An interesting finding was a decrease of the median frequency of vastus lateralis muscle during recovery in 8 subjects. The present findings showed that the relationship between EMG frequency decrease, lactate accumulation and fatigue, as observed in isometric protocols, cannot be simply applied to dynamic exercise.
Authors:
R Jansen; W Ament; G J Verkerke; A L Hof
Related Documents :
23610454 - Atrial fibrillation in endurance athletes.
8965264 - Submaximal exercise testing using lactate threshold and venous oxygen tension as endpoi...
16260974 - Validity of a single-visit protocol to estimate the maximum lactate steady state.
2038174 - Muscle metabolism and red cell atp/adp concentration during bicycle ergometer in patien...
15176904 - Oxidized mono-, di-, tri-, and polysaccharides as potential hemoglobin cross-linking re...
10727654 - Angiotensin ii receptor blockade attenuates the deleterious effects of exercise trainin...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  European journal of applied physiology and occupational physiology     Volume:  75     ISSN:  0301-5548     ISO Abbreviation:  Eur J Appl Physiol Occup Physiol     Publication Date:  1997  
Date Detail:
Created Date:  1997-04-22     Completed Date:  1997-04-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0410266     Medline TA:  Eur J Appl Physiol Occup Physiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  102-8     Citation Subset:  IM; S    
Affiliation:
Department of Human Movement Sciences, University of Groningen, The Netherlands.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Electromyography
Ergometry
Exercise / physiology*
Female
Humans
Lactates / metabolism*
Male
Muscle Fatigue / physiology*
Chemical
Reg. No./Substance:
0/Lactates

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


Previous Document:  The Ames miniscreen assay: volatility of sodium azide can cause an increase in the reversion frequen...
Next Document:  Gastric emptying in soldiers during and after field exercise in the heat measured with the [13C]acet...