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Touch-typing VDU operation: workstation adjustment, working posture, and workers' perceptions

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Author: Delleman, N.J. · Berndsen, M.B.
Type:article
Date:2002
Publisher: Taylor & Francis
Institution: TNO Technische Menskunde
Source:Ergonomics, 7, 45, 514 - 535
Identifier: 11380
doi: doi:10.1080/00140130210140319
Keywords: Workplace · Musculoskeletal system · Workload · Posture · Psychophysics · Musculoskeletal system · Posture · Psychophysics · Workload · Computer terminals · Musculoskeletal system · Personnel · Vision · Gaze inclination · Ergonomics · audiovisual equipment · back · backache · biomechanics · body posture · chair · depth perception · musculoskeletal system · neck injury · office worker · sitting · task performance · visual adaptation · visual display unit · workplace · Muscle, Skeletal · Occupations · Ocular Physiology · Perception · Beeldschermen · Spieraandoeningen · Ergonomie · Werkstoelen · Bureaustoelen

Abstract

At a VDU workstation professional touch-typing operators worked at eight different combined adjustments of visual target height and chair backrest inclination. Working posture, workers' perceptions and work performance were measured. Two conclusions were drawn. First, in order to minimize the load on the musculoskeletal system for touch-typing VDU operators, the gaze inclination to a visual target (screen, document) should be 6-9° (range 0-15°) below the horizontal and, second, the gaze inclination recommended is independent of sitting posture (that is with the backrest between upright and 15° inclined backwards).