Muscle fatigue in relation to forearm pain and tenderness among professional computer users

Gert F Thomsen, Pete W Johnson, Susanne W Svendsen, Ann I Kryger, Jens Peter E Bonde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

 
Udgivelsesdato: 2007-null
OriginalsprogEngelsk
TidsskriftJournal of Occupational Medicine and Toxicology (London)
Vol/bind2
Sider (fra-til)17
Antal sider1
ISSN1745-6673
DOI
StatusUdgivet - 1. jan. 2007

Fingeraftryk

Muscle Fatigue
fatigue
Forearm
Muscle
pain
Fatigue of materials
Palpation
Muscles
Wrist
Group
technician
complaint
assistant
Electric Stimulation
Body Mass Index
human being
gender
Recovery

Citer dette

Thomsen, Gert F ; Johnson, Pete W ; Svendsen, Susanne W ; Kryger, Ann I ; Bonde, Jens Peter E. / Muscle fatigue in relation to forearm pain and tenderness among professional computer users. I: Journal of Occupational Medicine and Toxicology (London). 2007 ; Bind 2. s. 17.
@article{b11ec190f0d711dc86ef000ea68e967b,
title = "Muscle fatigue in relation to forearm pain and tenderness among professional computer users",
abstract = "ABSTRACT: BACKGROUND: To examine the hypothesis that forearm pain with palpation tenderness in computer users is associated with increased extensor muscle fatigue. METHODS: Eighteen persons with pain and moderate to severe palpation tenderness in the extensor muscle group of the right forearm and twenty gender and age matched referents without such complaints were enrolled from the Danish NUDATA study of neck and upper extremity disorders among technical assistants and machine technicians. Fatigue of the right forearm extensor muscles was assessed by muscle twitch forces in response to low frequency (2 Hz) percutaneous electrical stimulation. Twitch forces were measured before, immediately after and 15 minutes into recovery of an extensor isometric wrist extension for ten minutes at 15 {\%} Maximal Voluntary Contraction (MVC). RESULTS: The average MVC wrist extension force and baseline stimulated twitch forces were equal in the case and the referent group. After the fatiguing contraction, a decrease in muscle average twitch force was seen in both groups, but the decrease was largest in the referent group: 27{\%} (95{\%} CI 17-37) versus 9{\%} (95{\%} CI -2 to 20). This difference in twitch force response was not explained by differences in the MVC or body mass index. CONCLUSION: Computer users with forearm pain and moderate to severe palpation tenderness had diminished forearm extensor muscle fatigue response. Additional studies are necessary to determine whether this result reflects an adaptive response to exposure without any pathophysiological significance, or represents a part of a causal pathway leading to pain.",
author = "Thomsen, {Gert F} and Johnson, {Pete W} and Svendsen, {Susanne W} and Kryger, {Ann I} and Bonde, {Jens Peter E}",
year = "2007",
month = "1",
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doi = "10.1186/1745-6673-2-17",
language = "English",
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journal = "Journal of Occupational Medicine and Toxicology (London)",
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Muscle fatigue in relation to forearm pain and tenderness among professional computer users. / Thomsen, Gert F; Johnson, Pete W; Svendsen, Susanne W; Kryger, Ann I; Bonde, Jens Peter E.

I: Journal of Occupational Medicine and Toxicology (London), Bind 2, 01.01.2007, s. 17.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Muscle fatigue in relation to forearm pain and tenderness among professional computer users

AU - Thomsen, Gert F

AU - Johnson, Pete W

AU - Svendsen, Susanne W

AU - Kryger, Ann I

AU - Bonde, Jens Peter E

PY - 2007/1/1

Y1 - 2007/1/1

N2 - ABSTRACT: BACKGROUND: To examine the hypothesis that forearm pain with palpation tenderness in computer users is associated with increased extensor muscle fatigue. METHODS: Eighteen persons with pain and moderate to severe palpation tenderness in the extensor muscle group of the right forearm and twenty gender and age matched referents without such complaints were enrolled from the Danish NUDATA study of neck and upper extremity disorders among technical assistants and machine technicians. Fatigue of the right forearm extensor muscles was assessed by muscle twitch forces in response to low frequency (2 Hz) percutaneous electrical stimulation. Twitch forces were measured before, immediately after and 15 minutes into recovery of an extensor isometric wrist extension for ten minutes at 15 % Maximal Voluntary Contraction (MVC). RESULTS: The average MVC wrist extension force and baseline stimulated twitch forces were equal in the case and the referent group. After the fatiguing contraction, a decrease in muscle average twitch force was seen in both groups, but the decrease was largest in the referent group: 27% (95% CI 17-37) versus 9% (95% CI -2 to 20). This difference in twitch force response was not explained by differences in the MVC or body mass index. CONCLUSION: Computer users with forearm pain and moderate to severe palpation tenderness had diminished forearm extensor muscle fatigue response. Additional studies are necessary to determine whether this result reflects an adaptive response to exposure without any pathophysiological significance, or represents a part of a causal pathway leading to pain.

AB - ABSTRACT: BACKGROUND: To examine the hypothesis that forearm pain with palpation tenderness in computer users is associated with increased extensor muscle fatigue. METHODS: Eighteen persons with pain and moderate to severe palpation tenderness in the extensor muscle group of the right forearm and twenty gender and age matched referents without such complaints were enrolled from the Danish NUDATA study of neck and upper extremity disorders among technical assistants and machine technicians. Fatigue of the right forearm extensor muscles was assessed by muscle twitch forces in response to low frequency (2 Hz) percutaneous electrical stimulation. Twitch forces were measured before, immediately after and 15 minutes into recovery of an extensor isometric wrist extension for ten minutes at 15 % Maximal Voluntary Contraction (MVC). RESULTS: The average MVC wrist extension force and baseline stimulated twitch forces were equal in the case and the referent group. After the fatiguing contraction, a decrease in muscle average twitch force was seen in both groups, but the decrease was largest in the referent group: 27% (95% CI 17-37) versus 9% (95% CI -2 to 20). This difference in twitch force response was not explained by differences in the MVC or body mass index. CONCLUSION: Computer users with forearm pain and moderate to severe palpation tenderness had diminished forearm extensor muscle fatigue response. Additional studies are necessary to determine whether this result reflects an adaptive response to exposure without any pathophysiological significance, or represents a part of a causal pathway leading to pain.

U2 - 10.1186/1745-6673-2-17

DO - 10.1186/1745-6673-2-17

M3 - Journal article

C2 - 18067676

VL - 2

SP - 17

JO - Journal of Occupational Medicine and Toxicology (London)

JF - Journal of Occupational Medicine and Toxicology (London)

SN - 1745-6673

ER -