Sano Yoko, Makimoto Atsushi, Hashizume Satoru, Murai Akihiko, Kobayashi Yoshiyuki, Takemura Hiroshi, Hobara Hiroaki
National Institute of Advanced Industrial Science and Technology, Tokyo, Japan; Tokyo University of Science, Chiba, Japan.
National Institute of Advanced Industrial Science and Technology, Tokyo, Japan.
Gait Posture. 2017 Jul;56:65-67. doi: 10.1016/j.gaitpost.2017.04.038. Epub 2017 May 4.
Carbon fiber running-specific prostheses are designed to reproduce the spring-like stepping behavior of individuals similar to springs loaded by the entire body mass (i.e. spring-mass model). The aim of this study was to test whether leg stiffness would be modulated differently between intact and prosthetic legs in transfemoral amputees wearing RSP during sprinting. Eight unilateral transfemoral amputees performed maximum sprinting along an indoor overground runway. Leg stiffness was calculated from kinetic and kinematic data in intact and prosthetic legs. The results showed that leg stiffness was for the prosthetic limb approximately 12% decreased compared to the intact limb. Although there was no difference in leg compression between the legs, maximal vertical ground reaction force was significantly greater in the intact leg than in the prosthetic one. These results indicate that asymmetric modulation of leg stiffness in transfemoral amputees with running-specific prostheses is mainly associated with asymmetric ground reaction force.
碳纤维跑步专用假肢旨在重现类似于由整个身体质量加载的弹簧的个体的弹簧式迈步行为（即弹簧-质量模型）。本研究的目的是测试在短跑过程中，佩戴跑步专用假肢的经股骨截肢者的健全腿和假肢腿之间的腿部僵硬度是否会有不同的调节。八名单侧经股骨截肢者在室内地面跑道上进行了最大速度短跑。根据健全腿和假肢腿的动力学和运动学数据计算腿部僵硬度。结果表明，与健全肢体相比，假肢肢体的腿部僵硬度大约降低了12%。尽管双腿之间的腿部压缩没有差异，但健全腿的最大垂直地面反作用力明显大于假肢腿。这些结果表明，使用跑步专用假肢的经股骨截肢者腿部僵硬度的不对称调节主要与不对称的地面反作用力有关。
