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The Effect of an Ergonomic Computer Device on Muscle Activity of the Upper Trapezius Muscle During Typing by M Tepper; M.M.R Vollenbroek-Hutten; H.J Hermens; C.T.M Baten is a Psychology article available to read on EtoBox.

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## Objective: Investigate whether an ergonomic computer device, characterised by an inclined working area and keyboard localisation close to the screen (the up-line), decreases the muscle activity of the upper trapezius muscle. ## Methods: In a crossover design 19 healthy subjects and 19 patients with whiplash associated disorder (wad) typed during 10 min at the up-line and at a standard workstation with 15 min of rest in between. during typing surface emg was measured of the trapezius muscle. the subjects were asked to rate sitting comfort and complaints. ## Results: Although most subjects subjectively preferred the up-line, on average no significant differences were found in muscle activity between the two workstations for both patients and healthy subjects. individually in 5 healthy subjects (25%) and in 6 patients (31%) muscle activity was lower when working at the up-line. ## Conclusion: Although some subjects subjectively prefer the up-line in sitting comfort, on average the up-line did not decrease the muscle activity, both in healthy subjects as in patients with wad.

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Author

M Tepper; M.M.R Vollenbroek-Hutten; H.J Hermens; C.T.M Baten

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0003-6870)

Published

2003

Language

EN

Field

Psychology (Social Sciences)