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There was no substantial interaction between display height and desk design.
Desk design and computer display height can affect posture and muscle activation during computer use.
Display height affected spinal muscle activity with paper tasks resulting in greater mean spinal and upper limb muscle activity.
Computer display height and desk design are believed to be important workstation features and are included in international standards and guidelines.
Computer display height and desk design to allow forearm support are two critical design features of workstations for information technology tasks.
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Lower display heights increased head and neck flexion with more spinal asymmetry when working with paper.
However there is currently no 3D description of head and neck posture with different computer display heights and no direct comparison to paper based information technology tasks.
The purpose of this study was to assess variability of posture and muscle activity during work with two computer display heights and book/paper, in conjunction with a curved desk designed to provide forearm support and a traditional, straight desk.
After defining ergonomically "ideal" postures, optimal solutions for key elements of an ergonomic design of the OR (position and height of the image displays, height of the OR table and the Mayo stand) could be evaluated with special regard to the different individual body size of each member of the team.
Thus, the influence of the background cannot be neglected and was removed by dividing the 8-h ES by the respective 3-monthly mean zonal mean ES OF. Figure 4 displays height-latitude cross sections of the normalised 8-h ES amplitude for solstice (DJF and JJA, left column) and equinox (MAM and SON, right column).
If the difference exceeded 0.5 cm, the measures were deleted in the PDA display and height was measured again.
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