Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings

PURPOSE: The reliability of surface electromyography (sEMG) is typically modest even with rigorous methods, and therefore further improvements in sEMG reliability are desirable. This study compared the between-session reliability (both within participant absolute reliability and between-participant...

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Autores principales: Balshaw, T. G., Fry, A., Maden-Wilkinson, T. M., Kong, P. W., Folland, J. P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5427161/
https://www.ncbi.nlm.nih.gov/pubmed/28391392
http://dx.doi.org/10.1007/s00421-017-3595-z
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author Balshaw, T. G.
Fry, A.
Maden-Wilkinson, T. M.
Kong, P. W.
Folland, J. P.
author_facet Balshaw, T. G.
Fry, A.
Maden-Wilkinson, T. M.
Kong, P. W.
Folland, J. P.
author_sort Balshaw, T. G.
collection PubMed
description PURPOSE: The reliability of surface electromyography (sEMG) is typically modest even with rigorous methods, and therefore further improvements in sEMG reliability are desirable. This study compared the between-session reliability (both within participant absolute reliability and between-participant relative reliability) of sEMG amplitude from single vs. average of two distinct recording sites, for individual muscle (IM) and whole quadriceps (WQ) measures during voluntary and evoked contractions. METHODS: Healthy males (n = 20) performed unilateral isometric knee extension contractions: voluntary maximum and submaximum (60%), as well as evoked twitch contractions on two separate days. sEMG was recorded from two distinct sites on each superficial quadriceps muscle. RESULTS: Averaging two recording sites vs. using single site measures improved reliability for IM and WQ measurements during voluntary (16–26% reduction in within-participant coefficient of variation, CV(W)) and evoked contractions (40–56% reduction in CV(W)). CONCLUSIONS: For sEMG measurements from large muscles, averaging the recording of two distinct sites is recommended as it improves within-participant reliability. This improved sensitivity has application to clinical and research measurement of sEMG amplitude.
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spelling pubmed-54271612017-05-26 Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings Balshaw, T. G. Fry, A. Maden-Wilkinson, T. M. Kong, P. W. Folland, J. P. Eur J Appl Physiol Original Article PURPOSE: The reliability of surface electromyography (sEMG) is typically modest even with rigorous methods, and therefore further improvements in sEMG reliability are desirable. This study compared the between-session reliability (both within participant absolute reliability and between-participant relative reliability) of sEMG amplitude from single vs. average of two distinct recording sites, for individual muscle (IM) and whole quadriceps (WQ) measures during voluntary and evoked contractions. METHODS: Healthy males (n = 20) performed unilateral isometric knee extension contractions: voluntary maximum and submaximum (60%), as well as evoked twitch contractions on two separate days. sEMG was recorded from two distinct sites on each superficial quadriceps muscle. RESULTS: Averaging two recording sites vs. using single site measures improved reliability for IM and WQ measurements during voluntary (16–26% reduction in within-participant coefficient of variation, CV(W)) and evoked contractions (40–56% reduction in CV(W)). CONCLUSIONS: For sEMG measurements from large muscles, averaging the recording of two distinct sites is recommended as it improves within-participant reliability. This improved sensitivity has application to clinical and research measurement of sEMG amplitude. Springer Berlin Heidelberg 2017-04-08 2017 /pmc/articles/PMC5427161/ /pubmed/28391392 http://dx.doi.org/10.1007/s00421-017-3595-z Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Original Article
Balshaw, T. G.
Fry, A.
Maden-Wilkinson, T. M.
Kong, P. W.
Folland, J. P.
Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
title Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
title_full Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
title_fullStr Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
title_full_unstemmed Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
title_short Reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
title_sort reliability of quadriceps surface electromyography measurements is improved by two vs. single site recordings
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5427161/
https://www.ncbi.nlm.nih.gov/pubmed/28391392
http://dx.doi.org/10.1007/s00421-017-3595-z
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