Cheng C K, Chen H H, Chen C S, Lee S J
Institute of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, ROC.
Biomed Mater Eng. 1998;8(3-4):155-65.
To more understand the influence of the walking speed on the spinal joint force distribution, a three-dimensional biomechanical model was used to estimate the spine loads during human gait with three different walking speeds. This previously developed and validated model included a dynamic external model and an internal model with forces of disc, 8 major muscles, 2 ligaments and 2 facet joints at L5/S1 level. A linear optimization method was used to solve the internal model to estimate the L5/S1 spinal joint force distribution. The results of five young male subjects showed that the mean peak L5/S1 disc compressive forces on the slow, preferred and fast speeds were 2.28, 2.53, 2.95 body weight, respectively. The peak forces happened right after the heel strike and before completely toe off. The facet joint forces were generally increased with the walking speed increase, too. To reduce the loads on the spine, the slow walking is then recommended for the patients with low back pain or after spinal surgery.
为了更深入了解步行速度对脊柱关节力分布的影响，使用三维生物力学模型来估计人类在三种不同步行速度下步态期间的脊柱负荷。这个先前开发并经过验证的模型包括一个动态外部模型和一个内部模型，内部模型包含L5/S1水平椎间盘、8块主要肌肉、2条韧带和2个小关节的力。使用线性优化方法求解内部模型，以估计L5/S1脊柱关节力分布。五名年轻男性受试者的结果表明，在慢、正常和快步行速度下，L5/S1椎间盘平均峰值压缩力分别为2.28、2.53和2.95倍体重。峰值力出现在足跟触地后紧接着且完全离地前。小关节力通常也随着步行速度的增加而增加。为了减轻脊柱负荷，建议腰痛患者或脊柱手术后的患者慢走。
