Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
Appl Ergon. 2018 May;69:146-152. doi: 10.1016/j.apergo.2018.01.015. Epub 2018 Feb 5.
This study investigated how task demands affect postural behaviour during standing. Twenty-four participants completed three different 12-min tasks: (1) a cognitive task that involved answering questions based on a written passage; (2) a light manual assembly task; and (3) standing quietly with no secondary task. The manual task was associated with the lowest amount of postural movement and a more static pose than the other two conditions. Specifically, postural variability of the lumbar (F = 5.8; p = 0.01) and thoracic (F = 4.2; p = 0.03) spine, and fidgets and shifts of the spine (F = 3.2; p = 0.048), were lowest in the manual task. Additionally, individuals perceiving tasks to be more demanding-regardless of task type-tended to move less (p = 0.049) than those perceiving lower demands. These findings provide important initial evidence that the type and perceived demands of standing work tasks can affect postural movement.
本研究调查了任务需求如何影响站立时的姿势行为。二十四名参与者完成了三项不同的 12 分钟任务：（1）一项认知任务，参与者需根据书面文章回答问题；（2）一项轻手动装配任务；（3）不进行次要任务的安静站立。与其他两种情况相比，手动任务与最少的姿势运动和更静态的姿势相关。具体来说，腰椎（F=5.8；p=0.01）和胸椎（F=4.2；p=0.03）的姿势变异性，以及脊柱的抖动和移位（F=3.2；p=0.048）在手动任务中最低。此外，无论任务类型如何，感知任务要求更高的个体往往比感知要求较低的个体移动得更少（p=0.049）。这些发现为站立工作任务的类型和感知需求可能影响姿势运动提供了重要的初步证据。
