College of Mechanical Engineering, Donghua University, Shanghai, China.
Faculty of Industrial Design Engineering, Delft University of Technology, The Netherlands.
Work. 2021;68(s1):S281-S287. doi: 10.3233/WOR-208026.
Many occupations require workers to stand for prolonged periods, which can cause discomfort, pain and even injures. Some supermarkets in life provide a foot pad for checkout staff to let them stand on it at work, thereby reducing standing fatigue caused by standing for a long time. The inclined platform is the same as the foot pad mentioned above. That is, the staff stepped on it and relieved standing fatigue to a certain extent.
The study aims to analyze how the standing angle affects fatigue among prolonged standing workers and tries to find an inclined platform with a specific angle to reduce standing fatigue.
This experiment studied fatigue of the inclined platforms with different angles on prolonged standing workers, eight participants were selected to participate in the test. The plantar pressures and sEMG (Surface Electromyography) were used to collect the physiological information change of prolonged standing participants in the lower limb and waist. The visual analogue scale was used as a subjective method to measure the psychological fatigue.
The study highlights the relationship between standing angle and lower limb fatigue. The inclination of the standing platform has different effects on the participants under different time conditions. When participants stand on inclined platforms at 0°, 5° and 10°, the iEMG (Integrated Electromyography) values of the gastrointestinal muscle were not significantly different until the third sampling point (40 minutes). After that self-regulation of lower limb muscles is better when standing on an inclined platform between 5° and 10°, it has a certain effect on alleviating lower limb fatigue. This knowledge is crucial for the design of the inclined working platforms fitting the needs of prolonged standing workers.
许多职业都要求工人长时间站立，这可能会导致不适、疼痛甚至受伤。一些超市为收银员提供脚垫，让他们在工作时站在上面，从而减轻长时间站立带来的疲劳。斜台与上文提到的脚垫类似，即员工踩在上面，在一定程度上缓解站立疲劳。
本研究旨在分析长时间站立工人的站立角度如何影响疲劳，并试图找到一个具有特定角度的斜台，以减轻站立疲劳。
本实验研究了不同角度的斜台对长时间站立工人的疲劳影响，选择了 8 名参与者参加测试。使用足底压力和表面肌电图（sEMG）收集长时间站立参与者下肢和腰部的生理信息变化。视觉模拟评分法（VAS）作为一种主观方法，用于测量心理疲劳。
该研究强调了站立角度与下肢疲劳之间的关系。站立平台的倾斜度在不同时间条件下对参与者有不同的影响。当参与者站在 0°、5°和 10°的倾斜平台上时，直到第三个采样点（40 分钟），胃肠道肌肉的 iEMG 值没有显著差异。在这之后，当站在 5°至 10°之间的倾斜平台上时，下肢肌肉的自我调节更好，对缓解下肢疲劳有一定的效果。这些知识对于设计符合长时间站立工人需求的倾斜工作平台至关重要。
