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Reliability of the Electromechanical Delay Components Assessment during the Relaxation Phase
Joint Authors
Cè, Emiliano
Esposito, Fabio
Rampichini, Susanna
Limonta, Eloisa
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-03-06
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
The study aimed to assess by an electromyographic (EMG), mechanomyographic (MMG), and force-combined approach the electrochemical and mechanical components of the overall electromechanical delay during relaxation (R-EMD).
Reliability of the measurements was also assessed.
To this purpose, supramaximal tetanic stimulations (50 Hz) were delivered to the gastrocnemius medialis muscle of 17 participants.
During stimulations, the EMG, MMG, and force signals were detected, and the time lag between EMG cessation and the beginning of force decay (Δt EMG-F, as temporal indicators of the electrochemical events) and from the initial force decrease to the largest negative peak of MMG signal during relaxation (Δt F-MMG, as temporal indicators of the mechanical events) was calculated, together with overall R-EMD duration (from EMG cessation to the largest MMG negative peak during relaxation).
Peak force (pF), half relaxation time (HRT), and MMG peak-to-peak during the relaxation phase (R-MMG p-p) were also calculated.
Test-retest reliability was assessed by Intraclass Correlation Coefficient (ICC).
With a total R-EMD duration of 96.9 ± 1.9 ms, Δt EMG-F contributed for about 24% (23.4 ± 2.7 ms) while Δt F-MMG for about 76% (73.5 ± 3.2 ms).
Reliability of the measurements was high for all variables.
Our findings show that the main contributor to R-EMD is represented by the mechanical components (series elastic components and muscle fibres behaviour), with a high reliability level for this type of approach.
American Psychological Association (APA)
Cè, Emiliano& Rampichini, Susanna& Limonta, Eloisa& Esposito, Fabio. 2013. Reliability of the Electromechanical Delay Components Assessment during the Relaxation Phase. Physiology Journal،Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-478020
Modern Language Association (MLA)
Cè, Emiliano…[et al.]. Reliability of the Electromechanical Delay Components Assessment during the Relaxation Phase. Physiology Journal No. 2013 (2013), pp.1-7.
https://search.emarefa.net/detail/BIM-478020
American Medical Association (AMA)
Cè, Emiliano& Rampichini, Susanna& Limonta, Eloisa& Esposito, Fabio. Reliability of the Electromechanical Delay Components Assessment during the Relaxation Phase. Physiology Journal. 2013. Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-478020
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-478020