The electromyographic fatigue threshold is not a valid tool to assess muscle function

Bouillard, Killian, Guevel, Arnaud and Hug, Francois (2011) The electromyographic fatigue threshold is not a valid tool to assess muscle function. Journal of Electromyography and Kinesiology, 21 2: 229-235. doi:10.1016/j.jelekin.2010.10.012


Author Bouillard, Killian
Guevel, Arnaud
Hug, Francois
Title The electromyographic fatigue threshold is not a valid tool to assess muscle function
Journal name Journal of Electromyography and Kinesiology   Check publisher's open access policy
ISSN 1050-6411
1873-5711
Publication date 2011-04
Year available 2011
Sub-type Article (original research)
DOI 10.1016/j.jelekin.2010.10.012
Volume 21
Issue 2
Start page 229
End page 235
Total pages 7
Place of publication London, United Kingdom
Publisher Elsevier
Collection year 2012
Language eng
Formatted abstract
The present study aimed at determining the electromyographic fatigue threshold (EMG FT) from the EMG activity level and the EMG frequency content of the First Dorsal Interosseous. Thirty-seven healthy subjects performed seven isometric index abductions at randomly ordered percentages of maximal voluntary contraction (i.e., 20%, 25%, 30%, 35%, 40%, 50% and 60%). During these bouts, surface EMG was measured using a linear electrodes array (i.e., seven EMG channels) in the First Dorsal Interosseous. For each subject the EMG FT was determined from both Root Mean Square (RMS) and Mean Power Frequency (MPF) values, only if the following criteria were met: (i) significant positive linear regression (P<0.05) between force and slope coefficient, (ii) an adjusted coefficient of determination for force versus slope coefficient relationship greater than 0.85, and (iii) a standard error for the EMG FT below 5% of MVC. The results showed the inability to determine an EMG FT in all of the 37 subjects from both RMS (9 out of 37 subjects) and MPF (27 out of 37 subjects). In addition, for the 12 subjects tested twice, the reproducibility of the EMG FT determination was weak (ICC=-0.029 and SEM=7.5% of MVC for EMG FT determined from MPF). The present results suggest that the EMG FT is not a valid tool to assess muscle function.
Keyword Mean power frequency
Evaluation
Fatigue
Precision
First Digitorum Interroseous
Neuromuscular Fatigue
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Health and Rehabilitation Sciences Publications
 
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Created: Wed, 28 Aug 2013, 16:36:01 EST by Francois Hug on behalf of School of Health & Rehabilitation Sciences