Straker L, Jones K J, Miller J
Curtin University, Perth, Australia.
Appl Ergon. 1997 Aug;28(4):263-8. doi: 10.1016/s0003-6870(96)00073-7.
This study evaluated the postural implications of using a laptop computer. Laptop computer screens and keyboards are joined, and are therefore unable to be adjusted separately in terms of screen height and distance, and keyboard height and distance. The posture required for their use is likely to be constrained, as little adjustment can be made for the anthropometric differences of users. In addition to the postural constraints, the study looked at discomfort levels and performance when using laptops as compared with desktops. Statistical analysis showed significantly greater neck flexion and head tilt with laptop use. The other body angles measured (trunk, shoulder, elbow, wrist, and scapula and neck protraction/retraction) showed no statistical differences. The average discomfort experienced after using the laptop for 20 min, although appearing greater than the discomfort experienced after using the desktop, was not significantly greater. When using the laptop, subjects tended to perform better than when using the desktop, though not significantly so. Possible reasons for the results are discussed and implications of the findings outlined.
本研究评估了使用笔记本电脑对姿势的影响。笔记本电脑的屏幕和键盘是连在一起的，因此在屏幕高度和距离、键盘高度和距离方面无法分别进行调整。由于针对用户的人体测量差异几乎无法进行调整，使用它们所需的姿势可能会受到限制。除了姿势限制外，该研究还考察了与台式机相比使用笔记本电脑时的不适程度和工作表现。统计分析表明，使用笔记本电脑时颈部弯曲和头部倾斜明显更大。所测量的其他身体角度（躯干、肩部、肘部、腕部、肩胛骨以及颈部前伸/后缩）没有统计学差异。使用笔记本电脑20分钟后所体验到的平均不适程度，虽然看起来比使用台式机后体验到的不适程度更大，但并没有显著更严重。使用笔记本电脑时，受试者的表现往往比使用台式机时更好，不过差异并不显著。文中讨论了这些结果的可能原因，并概述了研究结果的影响。
