Biofeedback effectiveness to reduce upper limb muscle activity during computer work is muscle specific and time pressure dependent

Pernille Vedsted, Karen Søgaard, Anne Katrine Blangsted, Pascal Madeleine, Gisela Sjøgaard

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Continuous electromyographic (EMG) activity level is considered a risk factor in developing muscle disorders. EMG biofeedback is known to be useful in reducing EMG activity in working muscles during computer work. The purpose was to test the following hypotheses: (1) unilateral biofeedback from trapezius (TRA) can reduce bilateral TRA activity but not extensor digitorum communis (EDC) activity; (2) biofeedback from EDC can reduce activity in EDC but not in TRA; (3) biofeedback is more effective in no time constraint than in the time constraint working condition. Eleven healthy women performed computer work during two different working conditions (time constraint/no time constraint) while receiving biofeedback. Biofeedback was given from right TRA or EDC through two modes (visual/auditory) by the use of EMG or mechanomyography as biofeedback source. During control sessions (no biofeedback), EMG activity was (mean+/-SD): 2.4+/-1.1, 2.5+/-2.1, and 9.1+/-3.1%max-EMGrms for right and left TRA and EDC, respectively. During biofeedback from TRA, activity was reduced in right TRA (1.7+/-1.6%max-EMGrms) and left TRA (1.2+/-2.0%max-EMGrms) compared to control. During biofeedback from EDC, activity in EDC was reduced (8.3+/-3.3%max-EMGrms) compared with control. During time constraint, activity was reduced in right TRA (1.9+/-1.3%max-EMGrms), left TRA (1.5+/-1.5%max-EMGrms), and EDC (8.4+/-3.2%max-EMGrms), during biofeedback compared to control. Conclusion: biofeedback reduced muscle activity in TRA by approximately 30-50% and in EDC by approximately 10% when given from the homologous or bilateral muscle but not from the remote muscle, and was significant in the time constraint condition; while feedback source and presentation mode showed only minor differences in the effect on reducing homologous muscle activity. This implies that biofeedback should be given from the most affected muscle in the occupational setting for targeting relief and prevention of muscle pain most effectively.
Original languageEnglish
JournalJournal of Electromyography & Kinesiology
Volume21
Issue number1
Pages (from-to) 49–58
Number of pages11
ISSN1050-6411
DOIs
Publication statusPublished - Feb 2011

Fingerprint

Superficial Back Muscles
Muscles
Myalgia
Muscular Diseases

Cite this

@article{5150d9afcf8449229f8ca6d59a22bb72,
title = "Biofeedback effectiveness to reduce upper limb muscle activity during computer work is muscle specific and time pressure dependent",
abstract = "Continuous electromyographic (EMG) activity level is considered a risk factor in developing muscle disorders. EMG biofeedback is known to be useful in reducing EMG activity in working muscles during computer work. The purpose was to test the following hypotheses: (1) unilateral biofeedback from trapezius (TRA) can reduce bilateral TRA activity but not extensor digitorum communis (EDC) activity; (2) biofeedback from EDC can reduce activity in EDC but not in TRA; (3) biofeedback is more effective in no time constraint than in the time constraint working condition. Eleven healthy women performed computer work during two different working conditions (time constraint/no time constraint) while receiving biofeedback. Biofeedback was given from right TRA or EDC through two modes (visual/auditory) by the use of EMG or mechanomyography as biofeedback source. During control sessions (no biofeedback), EMG activity was (mean+/-SD): 2.4+/-1.1, 2.5+/-2.1, and 9.1+/-3.1{\%}max-EMGrms for right and left TRA and EDC, respectively. During biofeedback from TRA, activity was reduced in right TRA (1.7+/-1.6{\%}max-EMGrms) and left TRA (1.2+/-2.0{\%}max-EMGrms) compared to control. During biofeedback from EDC, activity in EDC was reduced (8.3+/-3.3{\%}max-EMGrms) compared with control. During time constraint, activity was reduced in right TRA (1.9+/-1.3{\%}max-EMGrms), left TRA (1.5+/-1.5{\%}max-EMGrms), and EDC (8.4+/-3.2{\%}max-EMGrms), during biofeedback compared to control. Conclusion: biofeedback reduced muscle activity in TRA by approximately 30-50{\%} and in EDC by approximately 10{\%} when given from the homologous or bilateral muscle but not from the remote muscle, and was significant in the time constraint condition; while feedback source and presentation mode showed only minor differences in the effect on reducing homologous muscle activity. This implies that biofeedback should be given from the most affected muscle in the occupational setting for targeting relief and prevention of muscle pain most effectively.",
author = "Pernille Vedsted and Karen S{\o}gaard and Blangsted, {Anne Katrine} and Pascal Madeleine and Gisela Sj{\o}gaard",
note = "Copyright {\circledC} 2010. Published by Elsevier Ltd.",
year = "2011",
month = "2",
doi = "10.1016/j.jelekin.2010.06.002",
language = "English",
volume = "21",
pages = "49–58",
journal = "Journal of Electromyography & Kinesiology",
issn = "1050-6411",
publisher = "Elsevier",
number = "1",

}

Biofeedback effectiveness to reduce upper limb muscle activity during computer work is muscle specific and time pressure dependent. / Vedsted, Pernille; Søgaard, Karen; Blangsted, Anne Katrine; Madeleine, Pascal; Sjøgaard, Gisela.

In: Journal of Electromyography & Kinesiology, Vol. 21 , No. 1, 02.2011, p. 49–58.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Biofeedback effectiveness to reduce upper limb muscle activity during computer work is muscle specific and time pressure dependent

AU - Vedsted, Pernille

AU - Søgaard, Karen

AU - Blangsted, Anne Katrine

AU - Madeleine, Pascal

AU - Sjøgaard, Gisela

N1 - Copyright © 2010. Published by Elsevier Ltd.

PY - 2011/2

Y1 - 2011/2

N2 - Continuous electromyographic (EMG) activity level is considered a risk factor in developing muscle disorders. EMG biofeedback is known to be useful in reducing EMG activity in working muscles during computer work. The purpose was to test the following hypotheses: (1) unilateral biofeedback from trapezius (TRA) can reduce bilateral TRA activity but not extensor digitorum communis (EDC) activity; (2) biofeedback from EDC can reduce activity in EDC but not in TRA; (3) biofeedback is more effective in no time constraint than in the time constraint working condition. Eleven healthy women performed computer work during two different working conditions (time constraint/no time constraint) while receiving biofeedback. Biofeedback was given from right TRA or EDC through two modes (visual/auditory) by the use of EMG or mechanomyography as biofeedback source. During control sessions (no biofeedback), EMG activity was (mean+/-SD): 2.4+/-1.1, 2.5+/-2.1, and 9.1+/-3.1%max-EMGrms for right and left TRA and EDC, respectively. During biofeedback from TRA, activity was reduced in right TRA (1.7+/-1.6%max-EMGrms) and left TRA (1.2+/-2.0%max-EMGrms) compared to control. During biofeedback from EDC, activity in EDC was reduced (8.3+/-3.3%max-EMGrms) compared with control. During time constraint, activity was reduced in right TRA (1.9+/-1.3%max-EMGrms), left TRA (1.5+/-1.5%max-EMGrms), and EDC (8.4+/-3.2%max-EMGrms), during biofeedback compared to control. Conclusion: biofeedback reduced muscle activity in TRA by approximately 30-50% and in EDC by approximately 10% when given from the homologous or bilateral muscle but not from the remote muscle, and was significant in the time constraint condition; while feedback source and presentation mode showed only minor differences in the effect on reducing homologous muscle activity. This implies that biofeedback should be given from the most affected muscle in the occupational setting for targeting relief and prevention of muscle pain most effectively.

AB - Continuous electromyographic (EMG) activity level is considered a risk factor in developing muscle disorders. EMG biofeedback is known to be useful in reducing EMG activity in working muscles during computer work. The purpose was to test the following hypotheses: (1) unilateral biofeedback from trapezius (TRA) can reduce bilateral TRA activity but not extensor digitorum communis (EDC) activity; (2) biofeedback from EDC can reduce activity in EDC but not in TRA; (3) biofeedback is more effective in no time constraint than in the time constraint working condition. Eleven healthy women performed computer work during two different working conditions (time constraint/no time constraint) while receiving biofeedback. Biofeedback was given from right TRA or EDC through two modes (visual/auditory) by the use of EMG or mechanomyography as biofeedback source. During control sessions (no biofeedback), EMG activity was (mean+/-SD): 2.4+/-1.1, 2.5+/-2.1, and 9.1+/-3.1%max-EMGrms for right and left TRA and EDC, respectively. During biofeedback from TRA, activity was reduced in right TRA (1.7+/-1.6%max-EMGrms) and left TRA (1.2+/-2.0%max-EMGrms) compared to control. During biofeedback from EDC, activity in EDC was reduced (8.3+/-3.3%max-EMGrms) compared with control. During time constraint, activity was reduced in right TRA (1.9+/-1.3%max-EMGrms), left TRA (1.5+/-1.5%max-EMGrms), and EDC (8.4+/-3.2%max-EMGrms), during biofeedback compared to control. Conclusion: biofeedback reduced muscle activity in TRA by approximately 30-50% and in EDC by approximately 10% when given from the homologous or bilateral muscle but not from the remote muscle, and was significant in the time constraint condition; while feedback source and presentation mode showed only minor differences in the effect on reducing homologous muscle activity. This implies that biofeedback should be given from the most affected muscle in the occupational setting for targeting relief and prevention of muscle pain most effectively.

U2 - 10.1016/j.jelekin.2010.06.002

DO - 10.1016/j.jelekin.2010.06.002

M3 - Journal article

C2 - 20621506

VL - 21

SP - 49

EP - 58

JO - Journal of Electromyography & Kinesiology

JF - Journal of Electromyography & Kinesiology

SN - 1050-6411

IS - 1

ER -