The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture

The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture

The use of awkward wrist postures and unskilled techniques might induce lateral epicondylitis. This study thus investigated the effects of wrist deviation combined with extension and movement velocity on the dynamic performances of the wrist muscles during the coupling posture via a custom-made bi-p...

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Main Authors: Lee, Su-Ya, Chieh, Hsiao-Feng, Lin, Chien-Ju, Jou, I-Ming, Kuo, Li-Chieh, Su, Fong-Chin
Format: Online
Language:English
Published: Public Library of Science 2016
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865201/
id pubmed-4865201
recordtype oai_dc
spelling pubmed-48652012016-05-26 The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture Lee, Su-Ya Chieh, Hsiao-Feng Lin, Chien-Ju Jou, I-Ming Kuo, Li-Chieh Su, Fong-Chin Research Article The use of awkward wrist postures and unskilled techniques might induce lateral epicondylitis. This study thus investigated the effects of wrist deviation combined with extension and movement velocity on the dynamic performances of the wrist muscles during the coupling posture via a custom-made bi-planar isokinetic dynamometer. Thirty subjects were recruited to perform the isokinetic testing. We measured the muscle strengths and activities for the wrist extensors and flexors during concentric and eccentric contractions at three movement velocities, 30°s-1, 90°s-1, and 180°s-1, combined with three wrist postures, neutral position (NP), radial deviation (RD), and ulnar deviation (UD). The root mean square (RMS) of the electromyographic signal in the extensor digitorum communis (EDC), normalized peak torque of extensors, and ratio of normalized peak torque between wrist extensors and flexors, were all greater in the NP than RD and UD in both contractions. The ratio of RMS between EDC and flexor digitorum superficialis (FDS) had a significantly greater value in RD than UD during the concentric contraction. The EDC showed significantly higher activity at the fast velocity in both contractions. Nevertheless, a significantly higher RMS of the electromyographic signal between EDC and FDS and the ratio of strength between wrist extensors and flexors were found at slow velocity in both contractions. The wrist deviation combined with extension and movement velocity of the wrist joint should thus be considered as influential factors which might alter the dynamic performances, and may result in further injury of the elbow joint. Public Library of Science 2016-05-12 /pmc/articles/PMC4865201/ /pubmed/27171198 http://dx.doi.org/10.1371/journal.pone.0155379 Text en © 2016 Lee et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Lee, Su-Ya
Chieh, Hsiao-Feng
Lin, Chien-Ju
Jou, I-Ming
Kuo, Li-Chieh
Su, Fong-Chin
spellingShingle Lee, Su-Ya
Chieh, Hsiao-Feng
Lin, Chien-Ju
Jou, I-Ming
Kuo, Li-Chieh
Su, Fong-Chin
The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture
author_facet Lee, Su-Ya
Chieh, Hsiao-Feng
Lin, Chien-Ju
Jou, I-Ming
Kuo, Li-Chieh
Su, Fong-Chin
author_sort Lee, Su-Ya
title The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture
title_short The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture
title_full The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture
title_fullStr The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture
title_full_unstemmed The Potential Risk Factors Relevant to Lateral Epicondylitis by Wrist Coupling Posture
title_sort potential risk factors relevant to lateral epicondylitis by wrist coupling posture
description The use of awkward wrist postures and unskilled techniques might induce lateral epicondylitis. This study thus investigated the effects of wrist deviation combined with extension and movement velocity on the dynamic performances of the wrist muscles during the coupling posture via a custom-made bi-planar isokinetic dynamometer. Thirty subjects were recruited to perform the isokinetic testing. We measured the muscle strengths and activities for the wrist extensors and flexors during concentric and eccentric contractions at three movement velocities, 30°s-1, 90°s-1, and 180°s-1, combined with three wrist postures, neutral position (NP), radial deviation (RD), and ulnar deviation (UD). The root mean square (RMS) of the electromyographic signal in the extensor digitorum communis (EDC), normalized peak torque of extensors, and ratio of normalized peak torque between wrist extensors and flexors, were all greater in the NP than RD and UD in both contractions. The ratio of RMS between EDC and flexor digitorum superficialis (FDS) had a significantly greater value in RD than UD during the concentric contraction. The EDC showed significantly higher activity at the fast velocity in both contractions. Nevertheless, a significantly higher RMS of the electromyographic signal between EDC and FDS and the ratio of strength between wrist extensors and flexors were found at slow velocity in both contractions. The wrist deviation combined with extension and movement velocity of the wrist joint should thus be considered as influential factors which might alter the dynamic performances, and may result in further injury of the elbow joint.
publisher Public Library of Science
publishDate 2016
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4865201/
_version_ 1613578677234171904

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