The effect of upper extremity support on upper extremity posture and muscle activity during keyboard use

Cook, Catherine; Burgess-Limerick, Robin; Papalia, S.

doi:10.1016/j.apergo.2003.12.005

Cited by 92 publications

(67 citation statements)

References 21 publications

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“…Similarly, Visser et al (2000) found an increase in UT activity with wrist support, and no real effect of chair arm support. In contrast Cook et al (2004a) found a reduction in UT and anterior deltoid activity with forearm support provided by a straight desk (as well as with wrist support provided by a wrist rest) compared to a free floating arm position during keying. However, their other study (Cook et al, 2004b) found no differences between free floating and wrist rest conditions for both keying and mouse use tasks.…”

Section: Discussionmentioning

confidence: 38%

The impact of computer display height and desk design on muscle activity during information technology work by young adults

Straker

Pollock

Burgess-Limerick

et al. 2008

Journal of Electromyography and Kinesiology

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Computer display height and desk design are believed to be important workstation features and are included in international standards and guidelines. However, the evidence base for these guidelines is lacking a comparison of neck/shoulder muscle activity during computer and paper tasks and whether forearm support can be provided by desk design. This study measured the spinal and upper limb muscle activity in 36 young adults whilst they worked in different computer display, book and desk conditions. Display height affected spinal muscle activity with paper tasks resulting in greater mean spinal and upper limb muscle activity. A curved desk resulted in increased proximal muscle activity. There was no substantial interaction between display and desk. Crown

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Section: Discussionmentioning

confidence: 38%

The impact of computer display height and desk design on muscle activity during information technology work by young adults

Straker

Pollock

Burgess-Limerick

et al. 2008

Journal of Electromyography and Kinesiology

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“…With the development of industries, work-related musculoskeletal disorders (WRMSD) are increasing rapidly, and as the use of video display terminals (VDT) is becoming common due to the development of computers and office automation, workers'work-related musculoskeletal disorders are also becoming a large problem 1) .…”

Section: Introductionmentioning

confidence: 99%

“…Among musculoskeletal disorders occurring in workers who use video display terminals, work-related musculoskeletal disorders of the neck, upper extremity, and wrist frequently occur due to increases in the use of computers 1) , and the prevalence rate of these disorders was shown to exceed 76% 2) . Elements that may cause musculoskeletal disorders due to the use of computers include physical and ergonomic elements such as the heights of desks, chairs, and screens and working postures 2) and elements related to the use of devices such as computer mouses 3,4) .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Carpal Tunnel Changes on Smartphone Users

Shim

2012

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to examine changes in the carpal tunnels and median nerves appearing due to frequent movements of fingers by ultrasonography in young adults who frequently use smartphones.[Subjects] The subjects of this study were 20 young male and female adults who had no limitation in the range of movement of neck, shoulder, and arm joints, musculoskeletal disorder of the arm, or neurological symptoms such as paraesthesia and agreed to participate in the study.[Methods] The subjects who agreed to participate in this study were asked to use a smartphone for 30 minutes while maintaining comfortable sitting postures on a chair. They were asked to maintain the position of their shoulders comfortably while maintaining an angle of around 90° at the elbow. Some values measured before and after the experiment using a smartphone for 30 minutes were compared. The carpal tunnel was measured using ultrasonography.[Results] There were significant differences in median nerve circumference length, area of the median nerve area, distance between the highest point of the median nerve to the lunate, and distance between the bottom point of the median nerve to the lunate between before and after the experiment(p<0.05). [Conclusion] In conclusion, the use of smartphones for too long can be considered to adversely affect the wrist, and continued use can be considered to induce muscle fatigue.

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“…Other studies reported neck and upper extremity musculoskeletal symptoms in computer and computer-mouse users, so the differences were not unexpected, but less attention was devoted to the occurrence of musculoskeletal symptoms related to the use of portable computers or minicomputers, so our results, showing an increase of symptoms, seem of interest [19,20,21,22,23]. In addition, a systematic review of computer work and musculoskeletal disorders of the neck and upper extremity showed, e.g., limited evidence of a causal relationship between computer work per se or computer-mouse (or keyboard) time related to wrist tendonitis, forearm disorders and the tension neck syndrome [24].…”

Section: Comparison Of Daily Computer Users' Symptoms and Nonusers' Smentioning

confidence: 57%

White-Collar Workers’ Self-Reported Physical Symptoms Associated With Using Computers

Korpinen

Pääkkönen

Gobba

2012

International Journal of Occupational Safety and Ergonomics

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The effect of upper extremity support on upper extremity posture and muscle activity during keyboard use

Cited by 92 publications

References 21 publications

The impact of computer display height and desk design on muscle activity during information technology work by young adults

The impact of computer display height and desk design on muscle activity during information technology work by young adults

The Effect of Carpal Tunnel Changes on Smartphone Users

White-Collar Workers’ Self-Reported Physical Symptoms Associated With Using Computers

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