Department of Occupational Medicine, Danish Ramazzini Center, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200, Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 82, 8200, Aarhus N, Denmark.
Department of Occupational Medicine, University Research Clinic, Danish Ramazzini Centre, Goedstrup Hospital, 7400, Herning, Denmark.
Appl Ergon. 2024 Jan;114:104111. doi: 10.1016/j.apergo.2023.104111. Epub 2023 Aug 21.
To evaluate the effect of a shoulder exoskeleton on muscle activity and to compare the effect with a lifting glove among slaughterhouse workers in occupational settings.
We conducted a crossover study of 26 workers measured during two work days with and without the use of a passive shoulder exoskeleton and a lifting glove at a Danish slaughterhouse. Electromyography sensors were placed bilateral on 5 shoulder muscles. The 10th, 50th, and 90th percentiles of muscle activity normalized by maximal voluntary contractions were measured and analyzed using mixed effect models.
For the 50th percentiles of the agonist muscles, the exoskeleton reduced muscle activity bilaterally for deltoid anterior with up to 29.47%, deltoid middle with 10.22%, and upper trapezius with 22.21%. The lifting glove only reduced muscle activity for right deltoid anterior (36.59%) and upper trapezius (7.11%), but generally increased left muscle activity with up to 15.58%.
The exoskeleton showed larger reductions in muscle activity compared to the lifting glove.
评估肩部外骨骼在职业环境中对屠宰场工人肌肉活动的影响，并与提升手套进行比较。
我们在丹麦的一家屠宰场进行了一项交叉研究，共有 26 名工人参与，他们在两个工作日内分别使用和不使用被动肩部外骨骼和提升手套。肌电图传感器被放置在 5 个肩部肌肉的双侧。通过混合效应模型，对肌肉活动的第 10、50 和 90 百分位数进行了测量和分析，这些数据是通过最大自主收缩来归一化的。
对于 50 百分位的主动肌，外骨骼双侧减少了三角肌前束的肌肉活动，最大可达 29.47%，三角肌中束的肌肉活动减少了 10.22%，斜方肌上部的肌肉活动减少了 22.21%。提升手套仅减少了右侧三角肌前束（36.59%）和斜方肌上部（7.11%）的肌肉活动，但通常会增加左侧肌肉活动，最大可达 15.58%。
与提升手套相比，外骨骼在减少肌肉活动方面显示出更大的效果。
