Mastalerz Andrzej, Palczewska Iwona
Institute of Industrial Design, Warsaw, Poland.
Acta Bioeng Biomech. 2010;12(4):19-24.
The aim of the study was to estimate the influence of trunk inclination on muscle activity during sitting on forward inclined seats without backrest. The group consisting of thirteen healthy women was examined. Based on anthropometrical data two types of sitting position were adopted with two different angles between thighs and trunk: 120 and 135 degrees. Bioelectrical activity of five muscles was recorded. There was observed statistical influence of the trunk inclination on erector spinae, gastrocnemius lat. and tibialis anterior (p < 0.05). Especially, the inclination of seat pan influenced tibialis anterior activity (10%), although EMG measured during sitting did not exceed 20% of MVC.
本研究的目的是评估在没有靠背的前倾座椅上就坐时躯干倾斜对肌肉活动的影响。对由13名健康女性组成的小组进行了检查。根据人体测量数据，采用了两种坐姿，大腿与躯干之间有两个不同角度：120度和135度。记录了五块肌肉的生物电活动。观察到躯干倾斜对竖脊肌、外侧腓肠肌和胫骨前肌有统计学影响（p<0.05）。特别是，座板倾斜影响胫骨前肌的活动（10%），尽管就坐期间测得的肌电图未超过最大随意收缩的20%。
