Voiland School of Chemical Engineering and Bioengineering, P.O. Box 646515, Washington State University, Pullman, WA, 99164-6515, USA.
Washington State Department of Labor & Industries, 1250 Bishop Blvd. Suite G, Pullman, WA, 99163, USA.
Appl Ergon. 2023 Nov;113:104098. doi: 10.1016/j.apergo.2023.104098. Epub 2023 Jul 23.
Adjustable-height desks may provide musculoskeletal health benefits to offset the effects of prolonged sitting. One mechanism may be increased postural variability, here characterized by head and trunk postural sway. Linear acceleration of the head and trunk were measured while participants used computer workstations in seated and standing positions during keyboard and mouse tasks; secondary measures were discomfort and proprioception (head and neck repositioning error). Median accelerations of the head and trunk were 20-26% lower in mouse tasks compared to keyboard tasks (p < 0.01). There were no significant differences in sway parameters between seated and standing positions. Discomfort and proprioception were correlated; subjects who experienced increased neck discomfort after 1.5 h of computer work had almost twice the head and neck repositioning error. The results suggest that postural sway is more affected by different tasks (keyboard vs. mouse) than by different workstation configurations and that low proprioception acuity may relate to the development of discomfort.
可调节高度的办公桌可能通过增加姿势变化（这里表现为头部和躯干姿势摆动）为抵消长时间坐姿的影响提供肌肉骨骼健康益处。在参与者使用计算机工作站进行键盘和鼠标任务时，测量他们在坐姿和站姿下头部和躯干的线性加速度；次要措施是不适感和本体感受（头部和颈部重新定位误差）。与键盘任务相比，鼠标任务中头部和躯干的加速度中位数降低了 20-26%（p<0.01）。在坐姿和站姿之间，摆动参数没有显著差异。不适感和本体感受相关；在 1.5 小时的计算机工作后，颈部不适增加的受试者头部和颈部重新定位误差几乎增加了一倍。结果表明，姿势摆动受不同任务（键盘与鼠标）的影响大于不同工作站配置的影响，而本体感受敏锐度较低可能与不适的发展有关。
