Posture, discomfort and performance in a VDT task

Liao, Ming-Tzu; Drury, Colin G.

doi:10.1080/001401300184459

Cited by 134 publications

(66 citation statements)

References 18 publications

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“…Previous cross-sectional studies have indicated that discomfort and high perceived exertion may be associated with increased risks for musculoskeletal neck and upper extremity symptoms/disorders (Hsu and Wang, 2003;Karlqvist et al, 2002;Liao and Drury, 2000;Ortiz-Hernandez et al, 2003). Results from study IV confirmed these cross-sectional findings by showing that perceived exertion and, to a certain extent, perceived comfort during computer work are predictors for the development of neck and upper extremity symptoms.…”

Section: Perceived Exertion Comfort Neck and Upper Extremity Symptosupporting

confidence: 71%

Concordance between VDU-users’ ratings of comfort and perceived exertion with experts’ observations of workplace layout and working postures

Lindegård

Karlberg

Tornqvist³

et al. 2005

Applied Ergonomics

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All previously published papers have been reproduced with permission from the publisher.Published and printed by Intellecta DocuSys AB, Göteborg, Sweden, 2007 © Agneta Lindegård Andersson, 2007 ISBN 978-91-628-7098-0 Working technique during computer work Associations with biomechanical and psychological strain, neck and upper extremity musculoskeletal symptoms Agneta Lindegård AnderssonThe Sahlgrenska Academy at Göteborg University, Institute of Medicine Department of Public Health and Community Medicine Occupational and Environmental Medicine AbstractAbout 35 % of the working population in Sweden report that computer use accounts for 50% or more of their total working hours. Among this population approximately 40% of the women and 25% of the men experienced symptoms in the neck and/or upper extremities at least once a week during the preceding 3 month. The overall aim of the studies underlying this thesis was to explore possible associations between working technique and perceived exertion, comfort, biomechanical and psychosocial strain as well as neck and upper extremity symptoms among computer users. Specific research questions addressed were a) Whether working technique was associated with muscle activity, wrist positions and forces applied to the computer mouse, respectively? b) Whether working technique was associated with psychological demands, emotional stress and perceived muscle tension, respectively? c) Whether there were associations between self-rated perceived comfort and observations of workplace layout and between self-rated perceived exertion and working postures. d) Whether working technique perceived exertion and comfort was associated with neck and upper extremity symptoms.The results showed that subjects classified as having a good working technique worked with less muscular load in the forearm (p=0.03) and in the trapezius muscle on the mouse operating side (p=0.02) compared to subjects classified as having a poor working technique. Subjects who reported high psychological demands and perceived muscular tension, respectively, used poorer working technique than subjects who did not perceive this conditions (demands, p=0.03, muscular tension, p=0.02). Moreover, the concordance between ratings of comfort and observations of workplace layout was reasonably good concerning the working chair and the keyboard and good regarding the computer screen and the input device. The concordance between ratings of perceived exertion and observations of working postures indicated good agreement for all measured body locations. This applies to the group that rated poor comfort and high exertion. Regarding the group that rated good comfort and low exertion ratings must be supplemented with observations. Furthermore, the results revealed that high perceived exertion and low comfort were related to an increased incidence of neck, and upper extremity symptoms, while poor working technique was not associated with such a risk. It is concluded that working technique is associated with both biomechanical and p...

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Section: Perceived Exertion Comfort Neck and Upper Extremity Symptosupporting

confidence: 71%

Concordance between VDU-users’ ratings of comfort and perceived exertion with experts’ observations of workplace layout and working postures

Lindegård

Karlberg

Tornqvist³

et al. 2005

Applied Ergonomics

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“…It would suggest that management should perhaps focus on the patient's workstation, work postures, and behaviors. Support for this approach extends from the results of recent studies, which found the following: good working technique (defined as having forearm support, smooth movements when using mouse or keyboard, and relaxed shoulders) was associated with reduced muscular load of the forearm extensor muscles; 38 screen height influenced muscle activity of the cervical spine; 57 keyboard height changed working postures; 37 and physical symptoms of headache, stiff shoulders, and low back pain increased with increasing duration of daily computer use. 49 These findings would indicate that an occupational and ergonomic intervention approach might be beneficial in alleviating both the symptoms of lateral epicondylalgia as well as accompanying cervical symptoms.…”

Section: Discussionmentioning

confidence: 90%

Computer Use Associated With Poor Long-Term Prognosis of Conservatively Managed Lateral Epicondylalgia

Waugh¹,

Jaglal²,

Davis³

2004

J Orthop Sports Phys Ther

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Study Design: Multicenter prospective design with a cohort of patients with lateral epicondylalgia commencing physical therapy. Objective: To identify key factors associated with long-term prognosis of conservatively managed lateral epicondylalgia. Background: The response to conservative management of lateral epicondylalgia is inconsistent and the rate of recovery varies widely among individuals. The reasons for these discrepancies are not understood. The identification of factors associated with prognosis will aid in the prediction of patient outcomes. Methods and Measures: Sixty patients with lateral epicondylalgia, recruited from 9 sports medicine clinics and 2 hospital outpatient physical therapy departments in Ontario, Canada, were followed for 6 months. A baseline clinical assessment was conducted on each participant using standard physical therapy techniques. The Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire and a 100-mm pain visual analog scale (VAS) were completed at baseline and 6 months later. Results: The key factor associated with both 6-month DASH and pain VAS scores was repetitive-work tasks (DASH, 9.8 [P Ͻ .01]; pain VAS, 13.1 mm [P = .0105]). A subanalysis indicated that women were more likely than men to have cervical joint signs and, among women, positive cervical articular signs were also associated with higher final DASH and pain VAS scores. Conclusions: Although many of the participants identified sports activities as the cause of their injury, these findings emphasize the importance that a patient's work tasks can have on recovery of lateral epicondylalgia. This would suggest that management should perhaps focus on work stations, postures, and behaviors.

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“…However, after they change comfortable chairs with appropriate dimensions or change their postures, their work efficiency is improved unexpectedly. The work efficiency improvement due to comfortable chairs proves the statement [1][2] of ergonomics. At the same time, sitting for a long time and poor sitting postures adversely influence the human health, with an intensifying trend.…”

Section: Introductionmentioning

confidence: 76%

Evaluation and Study on Relationship between Sitting Posture and Work Efficiency

Xuesheng

Liyingi

2017

MATEC Web Conf.

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Abstract.The relationship between the work efficiency and the sitting posture of the office staff was analyzed by comparing changes in operation time of different tasks at different sitting postures. Combined with the body pressure distribution experiment, the relationship of operation time at different sitting postures was concluded, which provides reference for the study on office chair design and work efficiency improvement.

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Posture, discomfort and performance in a VDT task

Cited by 134 publications

References 18 publications

Concordance between VDU-users’ ratings of comfort and perceived exertion with experts’ observations of workplace layout and working postures

Concordance between VDU-users’ ratings of comfort and perceived exertion with experts’ observations of workplace layout and working postures

Computer Use Associated With Poor Long-Term Prognosis of Conservatively Managed Lateral Epicondylalgia

Evaluation and Study on Relationship between Sitting Posture and Work Efficiency

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