Postural stability is compromised by fatiguing overhead work.
Postural stability is compromised by fatiguing overhead work.
复制标题
过度的高空作业会损害姿势稳定性。
DOI：
10.1080/15428110308984786
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Nussbaum
中科院分区：
文献类型：
--
作者：
M. Nussbaum
在实验室环境中，16名参与者进行了重复的头顶轻拍任务3小时，直到由于肩部严重不适而自行终止。在安静站立和敲击任务期间，使用力板获得了几种姿势摇摆和稳定性的测量。摇摆面积和峰值摇摆速度随时间的增加而增加，而平均速度和峰值全身重心加速度的变化较小或不显著。虽然对几个任务变量相对不敏感，但在参与者终止的试验中，摇摆区域和峰值速度的变化要大得多。有人认为，疲劳在引起观察到的摇摆增加，从而降低姿势稳定性方面起着比简单的任务持续时间更重要的作用。局部肌肉骨骼压力的潜在全身后果似乎得到了结果的支持，并讨论了对安全、跌倒风险和工作安排的影响。
In a laboratory setting, 16 participants performed a repetitive overhead tapping task for 3 hours or until self-terminated due to substantial shoulder discomfort. Several measures of postural sway and stability were obtained using a force plate, both during quiet standing and during performance of the tapping task. Sway area and peak sway velocity showed consistent increases with time, whereas changes in average velocity and peak whole-body center-of-mass acceleration were either small or nonsignificant. Although relatively insensitive to several task variables, changes in sway areas and peak velocities were substantially larger in trials terminated by the participants. It is argued that fatigue plays a more important role than simple task duration in causing the observed increases in sway, and hence decreases in postural stability. Potential whole-body consequences of localized musculoskeletal stresses appear supported by the results, and implications for safety, risks of falls, and work scheduling are discussed.