Seidel H, Bluethner R, Hinz B
Int Arch Occup Environ Health. 1986;57(3):207-23. doi: 10.1007/BF00405789.
The aim of this experimental study was to estimate the strain in the lumbar spine due to whole-body vibration (WBV). Four male subjects were exposed to vertical sinusoidal WBV with frequencies ranging from 1 to 15 Hz at two intensities (I1 = 1.5 ms-2 rms; I2 = 3.0 ms-2 rms). The compressive forces acting on the disc L3-4 during the extreme values of acceleration were predicted on the basis of anthropometric data, EMG of back muscles and the acceleration of the upper trunk, using a simple biomechanical model. The estimated mechanical activity of back muscles was not able to protect the spine under many exposure conditions. The highest compressive forces were predicted for WBV with 7.5, 8 and 4.5 Hz. The results suggest the possibility of fatigue failures at the endplates of lumbar vertebrae after intense long-term exposure to WBV.
本实验研究的目的是评估全身振动（WBV）对腰椎造成的应变。四名男性受试者暴露于垂直正弦全身振动中，频率范围为1至15Hz，强度分为两种（I1 = 1.5ms-2均方根值；I2 = 3.0ms-2均方根值）。基于人体测量数据、背部肌肉肌电图和上躯干加速度，使用一个简单的生物力学模型预测了加速度极值期间作用于L3-4椎间盘的压缩力。在许多暴露条件下，估计的背部肌肉机械活动无法保护脊柱。预测在7.5、8和4.5Hz的全身振动下压缩力最高。结果表明，长期强烈暴露于全身振动后，腰椎终板可能会出现疲劳性损伤。
