Assessment of time patterns of activity and rest in full-shift recordings of trapezius muscle activity - Effects of the data processing procedure
(2013) In Journal of Electromyography & Kinesiology 23(3). p.540-547- Abstract
- The purpose of this paper was to compare the effects of different data reduction procedures on the values of variables characterizing the time pattern of trapezius muscle activity during full work shifts. Surface electromyography (EMG) of the right and left upper trapezius muscles were obtained from 40 young subjects in different occupations, mainly electricians, hairdressers and students. The target EMG variables were gap frequency, muscle rest, and the number and duration of episodes with sustained muscle activity (from 0.13 s to 30 min as minimum duration). These variables were derived from the EMG recordings using different Root Mean Square (RMS) windows (from 0.13 to 6.38 s), and discrimination levels between "activity" and "rest"... (More)
- The purpose of this paper was to compare the effects of different data reduction procedures on the values of variables characterizing the time pattern of trapezius muscle activity during full work shifts. Surface electromyography (EMG) of the right and left upper trapezius muscles were obtained from 40 young subjects in different occupations, mainly electricians, hairdressers and students. The target EMG variables were gap frequency, muscle rest, and the number and duration of episodes with sustained muscle activity (from 0.13 s to 30 min as minimum duration). These variables were derived from the EMG recordings using different Root Mean Square (RMS) windows (from 0.13 to 6.38 s), and discrimination levels between "activity" and "rest" (0.5%, 1% and 2% of maximal EMG). The results give basis for practical suggestions for EMG analyses of full work shifts. For most variables, a discrimination level of 0.5% EMG(max) showed to be preferable. The time proportion of muscle rest and sustained muscle activity should, in general, be preferred over the corresponding frequency measures. Sustained muscle activity should be calculated using a RMS window between 1 and 3 s, and preferably be stated in terms of variables describing time proportions of activity. Uninterrupted activity episodes longer than 10 min proved not to be a useful variable due to limited occurrence in many work shifts. (C) 2013 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3932513
- author
- Veiersted, Kaj Bo ; Forsman, Mikael ; Hansson, Gert-Åke LU and Mathiassen, Svend Erik
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Electromyography, Muscle activity, Data processing, Exposure, Time, variation
- in
- Journal of Electromyography & Kinesiology
- volume
- 23
- issue
- 3
- pages
- 540 - 547
- publisher
- Elsevier
- external identifiers
-
- wos:000318905600003
- scopus:84876976445
- pmid:23375714
- ISSN
- 1873-5711
- DOI
- 10.1016/j.jelekin.2012.12.004
- language
- English
- LU publication?
- yes
- id
- e7c161f1-6cc4-4ede-9952-bc1cf1af6333 (old id 3932513)
- date added to LUP
- 2016-04-01 10:14:23
- date last changed
- 2022-01-25 21:11:09
@article{e7c161f1-6cc4-4ede-9952-bc1cf1af6333,
abstract = {{The purpose of this paper was to compare the effects of different data reduction procedures on the values of variables characterizing the time pattern of trapezius muscle activity during full work shifts. Surface electromyography (EMG) of the right and left upper trapezius muscles were obtained from 40 young subjects in different occupations, mainly electricians, hairdressers and students. The target EMG variables were gap frequency, muscle rest, and the number and duration of episodes with sustained muscle activity (from 0.13 s to 30 min as minimum duration). These variables were derived from the EMG recordings using different Root Mean Square (RMS) windows (from 0.13 to 6.38 s), and discrimination levels between "activity" and "rest" (0.5%, 1% and 2% of maximal EMG). The results give basis for practical suggestions for EMG analyses of full work shifts. For most variables, a discrimination level of 0.5% EMG(max) showed to be preferable. The time proportion of muscle rest and sustained muscle activity should, in general, be preferred over the corresponding frequency measures. Sustained muscle activity should be calculated using a RMS window between 1 and 3 s, and preferably be stated in terms of variables describing time proportions of activity. Uninterrupted activity episodes longer than 10 min proved not to be a useful variable due to limited occurrence in many work shifts. (C) 2013 Elsevier Ltd. All rights reserved.}},
author = {{Veiersted, Kaj Bo and Forsman, Mikael and Hansson, Gert-Åke and Mathiassen, Svend Erik}},
issn = {{1873-5711}},
keywords = {{Electromyography; Muscle activity; Data processing; Exposure; Time; variation}},
language = {{eng}},
number = {{3}},
pages = {{540--547}},
publisher = {{Elsevier}},
series = {{Journal of Electromyography & Kinesiology}},
title = {{Assessment of time patterns of activity and rest in full-shift recordings of trapezius muscle activity - Effects of the data processing procedure}},
url = {{http://dx.doi.org/10.1016/j.jelekin.2012.12.004}},
doi = {{10.1016/j.jelekin.2012.12.004}},
volume = {{23}},
year = {{2013}},
}