符合人体工程学设计的工作站对地毯编织过程中肩部肌电图活动的影响。
The Impact of Ergonomically Designed Workstations on Shoulder EMG Activity during Carpet Weaving.
作者信息
Motamedzade Majid, Afshari Davood, Soltanian Alireza
机构信息
Ergonomics Department, Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.
Department of Occupational Health, Jundishapur University of Medical Sciences, Ahvaz, Iran.
出版信息
Health Promot Perspect. 2014 Dec 30;4(2):144-50. doi: 10.5681/hpp.2014.019. eCollection 2014.
BACKGROUND
The present study aimed to evaluate the biomechanical exposure to the trapezius muscle activity in female weavers for a prolonged period in the workstation A (suggested by previous studies) and workstation B (proposed by the present study).
METHODS
Electromyography data were collected from nine females during four hours for each ergonomically designed workstation at the Ergonomics Laboratory, Hamadan, Iran. The design criteria for ergonomically designed workstations were: 1) weaving height (20 and 3 cm above elbow height for workstations A and B, respectively), and 2) seat type (10° and 0° forwardsloping seat for workstations A and B, respectively).
RESULTS
The amplitude probability distribution function (APDF) analysis showed that the left and right upper trapezius muscle activity was almost similar at each workstation. Trapezius muscle activity in the workstation A was signifi-cantly greater than workstations B (P<0.001).
CONCLUSION
In general, use of workstation B leads to significantly reduced muscle activity levels in the upper trapezius as compared to workstation A in weavers. Despite the positive impact of workstation B in reducing trapezius muscle activity, it seems that constrained postures of the upper arm during weaving may be associated with musculoskeletal symptoms.
背景
本研究旨在评估在工作站A（先前研究建议）和工作站B（本研究提出）中，女性织布工长时间工作时斜方肌活动所承受的生物力学负荷。
方法
在伊朗哈马丹的人体工程学实验室，对9名女性在每个符合人体工程学设计的工作站进行4小时的肌电图数据采集。符合人体工程学设计的工作站的设计标准为：1）织布高度（工作站A和B分别为肘部高度上方20厘米和3厘米），以及2）座椅类型（工作站A和B分别为向前倾斜10°和0°的座椅）。
结果
幅度概率分布函数（APDF）分析表明，每个工作站左右上斜方肌的活动几乎相似。工作站A的斜方肌活动明显大于工作站B（P<0.001）。
结论
总体而言，与工作站A相比，使用工作站B可使织布工上斜方肌的肌肉活动水平显著降低。尽管工作站B在降低斜方肌肌肉活动方面有积极影响，但织布过程中上臂的受限姿势似乎可能与肌肉骨骼症状有关。
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