Prolonged slumped sitting causes neck pain and increased axioscapular muscle activity during a computer task in healthy participants – A randomized crossover study

Sitting posture may contribute to spinal pain. Effects of postures on pain, sensitivity and muscle activity during computer tasks were investigated. Twenty-five healthy participants, seated at a workstation without backrest, completed four, 15-min typing tasks: A)Upright with forearm-support; B)Upri...

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Bibliographic Details
Published in:Applied ergonomics 2023-07, Vol.110, p.104020-104020, Article 104020
Main Authors: Christensen, Steffan Wittrup McPhee, Palsson, Thorvaldur Skuli, Krebs, Hans Jørgen, Graven-Nielsen, Thomas, Hirata, Rogerio Pessoto
Format: Article
Language:English
Subjects:
Computers
Cross-Over Studies
Electromyography
Healthy Volunteers
Humans
Muscle, Skeletal - physiology
Neck pain
Neck Pain - etiology
Pain intensity
Pain sensitivity
Posture
Sitting Position
Spine
Superficial Back Muscles
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Summary:Sitting posture may contribute to spinal pain. Effects of postures on pain, sensitivity and muscle activity during computer tasks were investigated. Twenty-five healthy participants, seated at a workstation without backrest, completed four, 15-min typing tasks: A)Upright with forearm-support; B)Upright without forearm-support; C)Slumped with forearm-support; D)Slumped without forearm-support. Participants rated pain every minute on a numerical rating scale (NRS). RMS-EMG was recorded from upper/lower trapezius (UT, LT), serratus anterior and anterior/middle deltoid. At baseline and after tasks, pressure pain thresholds (PPTs) were recorded bilaterally over the head, UT, and leg. All tasks caused clinically relevant increased NRS (≥2/10) compared to baseline (P 
ISSN:0003-6870
1872-9126
DOI:10.1016/j.apergo.2023.104020