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The effect of two types of maximal voluntary contraction and two electrode positions in field recordings of forearm extensor muscle activity during hotel room cleaning

Dahlqvist, Camilla LU ; Enquist, Henrik LU orcid ; Löfqvist, Lotta LU and Nordander, Catarina LU orcid (2020) In International Journal of Occupational Safety and Ergonomics 26(3). p.595-602
Abstract

Purpose. This study aimed to investigate the effects of using hand grip or resisted wrist extension as the reference contraction, and two electrode positions, on field recordings of forearm extensor muscle activity. Materials and methods. Right forearm extensor muscle activity was recorded using two electrode pairs (over the most prominent part (position 2) and proximal to that (position 1)) during one working day in 13 female hotel housekeepers. Each subject performed the two maximal voluntary contractions (MVCs), and the electrical activity obtained during these (maximal voluntary electrical activity (MVE)) was used for normalization. Each set of recordings was analysed twice, once using hand grip as the MVC and once using resisted... (More)

Purpose. This study aimed to investigate the effects of using hand grip or resisted wrist extension as the reference contraction, and two electrode positions, on field recordings of forearm extensor muscle activity. Materials and methods. Right forearm extensor muscle activity was recorded using two electrode pairs (over the most prominent part (position 2) and proximal to that (position 1)) during one working day in 13 female hotel housekeepers. Each subject performed the two maximal voluntary contractions (MVCs), and the electrical activity obtained during these (maximal voluntary electrical activity (MVE)) was used for normalization. Each set of recordings was analysed twice, once using hand grip as the MVC and once using resisted wrist extension. Results. Resisted wrist extension showed a higher group mean MVE than hand grip. Position 2 had higher correlation between MVE and force during the MVCs. The workload during cleaning was lower when using resisted wrist extension as reference than when using hand grip (24%MVE vs 46%MVE; p = 0.002 at position 2) for the 90th percentile. The workload (99th percentile) was overestimated in two subjects when using hand grip as reference. Conclusions. Problems associated with poorly activated forearm extensors can be overcome by using resisted wrist extension as reference.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
electromyography amplitude, hand grip, maximal voluntary contraction, maximal voluntary electrical activity, power grip, resisted wrist extension
in
International Journal of Occupational Safety and Ergonomics
volume
26
issue
3
pages
8 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85067897446
  • pmid:30932748
ISSN
1080-3548
DOI
10.1080/10803548.2019.1599572
language
English
LU publication?
yes
id
fda2a742-cbef-4a23-b0b7-614555fdf622
date added to LUP
2019-07-05 09:02:43
date last changed
2024-11-13 13:40:20
@article{fda2a742-cbef-4a23-b0b7-614555fdf622,
  abstract     = {{<p>Purpose. This study aimed to investigate the effects of using hand grip or resisted wrist extension as the reference contraction, and two electrode positions, on field recordings of forearm extensor muscle activity. Materials and methods. Right forearm extensor muscle activity was recorded using two electrode pairs (over the most prominent part (position 2) and proximal to that (position 1)) during one working day in 13 female hotel housekeepers. Each subject performed the two maximal voluntary contractions (MVCs), and the electrical activity obtained during these (maximal voluntary electrical activity (MVE)) was used for normalization. Each set of recordings was analysed twice, once using hand grip as the MVC and once using resisted wrist extension. Results. Resisted wrist extension showed a higher group mean MVE than hand grip. Position 2 had higher correlation between MVE and force during the MVCs. The workload during cleaning was lower when using resisted wrist extension as reference than when using hand grip (24%MVE vs 46%MVE; p = 0.002 at position 2) for the 90th percentile. The workload (99th percentile) was overestimated in two subjects when using hand grip as reference. Conclusions. Problems associated with poorly activated forearm extensors can be overcome by using resisted wrist extension as reference.</p>}},
  author       = {{Dahlqvist, Camilla and Enquist, Henrik and Löfqvist, Lotta and Nordander, Catarina}},
  issn         = {{1080-3548}},
  keywords     = {{electromyography amplitude; hand grip; maximal voluntary contraction; maximal voluntary electrical activity; power grip; resisted wrist extension}},
  language     = {{eng}},
  number       = {{3}},
  pages        = {{595--602}},
  publisher    = {{Taylor & Francis}},
  series       = {{International Journal of Occupational Safety and Ergonomics}},
  title        = {{The effect of two types of maximal voluntary contraction and two electrode positions in field recordings of forearm extensor muscle activity during hotel room cleaning}},
  url          = {{http://dx.doi.org/10.1080/10803548.2019.1599572}},
  doi          = {{10.1080/10803548.2019.1599572}},
  volume       = {{26}},
  year         = {{2020}},
}