The effect of muscle fatigue on stimulus intensity requirements for central and peripheral fatigue quantification.

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Serval ID
serval:BIB_C219B8DD2DFB
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
The effect of muscle fatigue on stimulus intensity requirements for central and peripheral fatigue quantification.
Journal
European Journal of Applied Physiology
Author(s)
Neyroud D., Vallotton A., Millet G.Y., Kayser B., Place N.
ISSN
1439-6327 (Electronic)
ISSN-L
1439-6319
Publication state
Published
Issued date
2014
Volume
114
Number
1
Pages
205-215
Language
english
Notes
Publication types: Journal ArticlePublication Status: ppublish
Abstract
PURPOSE: The present study was designed to determine the stimulation intensity necessary for an adequate assessment of central and peripheral components of neuromuscular fatigue of the knee extensors.
METHODS: Three different stimulation intensities (100, 120 and 150 % of the lowest intensity evoking a plateau in M-waves and twitch amplitudes, optimal stimulation intensity, OSI) were used to assess voluntary activation level (VAL) as well as M-wave, twitch and doublet amplitudes before, during and after an incremental isometric exercise performed by 14 (8 men) healthy and physically active volunteers. A visual analog scale was used to evaluate the associated discomfort.
RESULTS: There was no difference (p > 0.05) in VAL between the three intensities before and after exercise. However, we found that stimulating at 100 % OSI may overestimate the extent of peripheral fatigue during exercise, whereas 150 % OSI stimulations led to greater discomfort associated with doublet stimulations as well as to an increased antagonist co-activation compared to 100 % OSI.
CONCLUSION: We recommend using 120 % OSI, as it constitutes a good trade-off between discomfort and reliable measurements.
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Web of science
Create date
07/02/2014 19:19
Last modification date
28/09/2021 6:57
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