Young Justin G, Trudeau Matthieu, Odell Dan, Marinelli Kim, Dennerlein Jack T
Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115, USA.
Work. 2012;41(1):81-91. doi: 10.3233/WOR-2012-1337.
The aim of this study was to determine how head and neck postures vary when using two media tablet (slate) computers in four common user configurations.
Fifteen experienced media tablet users completed a set of simulated tasks with two media tablets in four typical user configurations. The four configurations were: on the lap and held with the user's hands, on the lap and in a case, on a table and in a case, and on a table and in a case set at a high angle for watching movies. An infra-red LED marker based motion analysis system measured head/neck postures.
Head and neck flexion significantly varied across the four configurations and across the two tablets tested. Head and neck flexion angles during tablet use were greater, in general, than angles previously reported for desktop and notebook computing. Postural differences between tablets were driven by case designs, which provided significantly different tilt angles, while postural differences between configurations were driven by gaze and viewing angles.
Head and neck posture during tablet computing can be improved by placing the tablet higher to avoid low gaze angles (i.e. on a table rather than on the lap) and through the use of a case that provides optimal viewing angles.
本研究旨在确定在四种常见用户配置下使用两种媒体平板电脑（平板）时，头部和颈部姿势如何变化。
15名经验丰富的媒体平板电脑用户在四种典型用户配置下，使用两种媒体平板电脑完成了一组模拟任务。这四种配置分别是：放在腿上并用手拿着、放在腿上且装在保护套里、放在桌子上且装在保护套里、放在桌子上且将保护套设置为高角度以观看电影。基于红外发光二极管标记的运动分析系统测量头部/颈部姿势。
在测试的两种平板电脑中，头部和颈部的屈曲在四种配置下有显著差异。一般来说，使用平板电脑时头部和颈部的屈曲角度大于之前报道的台式机和笔记本电脑使用时的角度。平板电脑之间的姿势差异由保护套设计驱动，保护套提供了显著不同的倾斜角度，而配置之间的姿势差异由注视和视角驱动。
通过将平板电脑放置得更高以避免低视角（即放在桌子上而不是腿上）以及使用提供最佳视角的保护套，可以改善平板电脑计算过程中的头部和颈部姿势。
