Document Detail

The impact of damaging exercise on electromechanical delay in biceps brachii.
MedLine Citation:
PMID:  20060744     Owner:  NLM     Status:  MEDLINE    
Electromechanical delay (EMD) can be a useful tool in providing information on muscle function changes following a number of exercise interventions. The purpose of this investigation was to examine the effect of damaging exercise on EMD. Twelve volunteers completed 45 maximal lengthening contractions of the elbow flexors. Indices of muscle damage (maximum voluntary isometric torque and isokinetic torque (60s(-1) and 210 s(-1)), creatine kinase (CK), muscle soreness (DOMS)) were recorded pre-exercise, 48 h and 96 h post-exercise; electromyography was recorded from the belly of biceps brachii and EMD was determined during each contraction condition. Significant time effects were observed for all damage indices (P<0.05). Whilst muscle function was close to full recovery at 96 h, both CK and DOMS were significantly (P<0.001) elevated above baseline. EMD was significantly greater at 96 h for all contraction conditions (P0<or=0.017), but not at 48 h. Damaging exercise induces alterations in EMD beyond the apparent recovery of maximal voluntary contractions, which is likely to be a reflection of the changes in post-synaptic events. These data have applications for the use of EMD as a tool for exercise prescription and monitoring recovery following strenuous damaging exercise.
Glyn Howatson
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Publication Detail:
Type:  Journal Article     Date:  2010-01-08
Journal Detail:
Title:  Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology     Volume:  20     ISSN:  1873-5711     ISO Abbreviation:  J Electromyogr Kinesiol     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-03-23     Completed Date:  2010-06-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9109125     Medline TA:  J Electromyogr Kinesiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  477-81     Citation Subset:  IM    
Copyright Information:
(c) 2009. Published by Elsevier Ltd.
School of Psychology and Sport Sciences, Northumbria University, Newcastle, UK.
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MeSH Terms
Creatine Kinase / metabolism*
Cumulative Trauma Disorders / physiopathology*
Muscle Contraction*
Muscle Strength*
Muscle, Skeletal / physiopathology*
Physical Exertion*
Reg. No./Substance:
EC Kinase

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

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