Shigeta S, Misawa T, Aikawa H, Kondo A
Sangyo Igaku. 1979 Mar;21(2):164-70. doi: 10.1539/joh1959.21.164.
The relation between work postures and muscle load, the differences of muscle load in holding two different shaped objects, a human model and a box each weighting 20 kg, and the effects of wearing a belt and a corset to reduce the low back muscle load were studied in the experimental nursing work on physically and/or mentally handicapped patients. Four female healthy college students exercised a static and a dynamic nursing work designed for the experiment. E.M.G., heart rate, subjective symptoms and maximum sustaining time were measured during the work. Results are as follows: 1) The low back muscle load increased only in sustaining the forward bending posture. 2) The forward bending posture with a load weighing 20 kg caused shortening of the time to sustain the same posture. 3) The muscle load by holding the human model was larger compared to that by holding the box, and the muscle load was different according to the shape of the holding objects. 4) Wearing a belt and a corset was effective to reduce the low back muscle load by raising the abdominal pressure.
在针对身体和/或精神残疾患者的实验性护理工作中，研究了工作姿势与肌肉负荷之间的关系、手持两个不同形状物体（一个人体模型和一个各重20千克的盒子）时肌肉负荷的差异，以及佩戴腰带和紧身胸衣对减轻下背部肌肉负荷的影响。四名健康的女大学生进行了为该实验设计的静态和动态护理工作。在工作过程中测量了肌电图、心率、主观症状和最长持续时间。结果如下：1）仅在维持前屈姿势时，下背部肌肉负荷增加。2）手持20千克重物的前屈姿势导致维持相同姿势的时间缩短。3）手持人体模型时的肌肉负荷比手持盒子时更大，并且肌肉负荷因手持物体的形状而异。4）佩戴腰带和紧身胸衣通过提高腹压，对减轻下背部肌肉负荷有效。
