Document Detail

Effect of Sustained Typing Work on Changes in Scapular Position, Pressure Pain Sensitivity and Upper Trapezius Activity.
MedLine Citation:
PMID:  23585498     Owner:  NLM     Status:  Publisher    
Objective: The aim of this study was to investigate the effects of sustained computer keyboard typing on the human musculoskeletal system by assessing the pressure-pain threshold (PPT), scapular position and activation of the upper trapezius. Methods: Vertical and horizontal positional changes of the scapular were measured with a palpation meter before and after keyboard work, and the PPT was measured using a pressure algometer. Activation of the upper trapezius during 20 minutes of computer keyboard work was measured by electromyography, and four consecutive 5-minute segments were analyzed. Results: The vertical distance from the seventh cervical process to the acromion, and the horizontal distance from the inferior angle to the same level of the spinal process were significantly increased after keyboard typing work compared with before keyboard typing work (p < 0.05). The average value of the upper trapezius activity increased with increased time at the keyboard. The percent reference voluntary contraction of phase 1 (from start to 5 minutes) was lower than those of phase 2 (from 5 to 10 minutes), and phase 3 (from 10 to 15 minutes) (p < 0.05). Conclusion: We observed that sustained computer work changed the scapular position in the stretched upper trapezius. To prevent musculoskeletal problems in the shoulder region, posture reeducation during computer work should be considered in terms not only of neck and trunk posture, but also of scapular position.
Se-Yeon Park; Won-Gyu Yoo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-4-13
Journal Detail:
Title:  Journal of occupational health     Volume:  -     ISSN:  1348-9585     ISO Abbreviation:  J Occup Health     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-4-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9616320     Medline TA:  J Occup Health     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Physical Therapy, The Graduate School, Inje University.
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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