Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
Artificial Intelligence Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tokyo, Japan; Department of Systems and Control Engineering, Tokyo Institute of Technology, Tokyo, Japan.
Clin Biomech (Bristol). 2020 Dec;80:105132. doi: 10.1016/j.clinbiomech.2020.105132. Epub 2020 Jul 31.
Running with prostheses has become a common activity for amputees participating in sports and recreation. However, very few studies have characterized the kinematic and kinetic parameters of walking in individuals with amputation who are runners. Thus, this study attempts to elucidate the kinematics and kinetics of walking in runners with a unilateral transfemoral amputation or knee-disarticulation.
This study experimentally compares the prosthetic and intact limbs of runners with prostheses as well as compares the findings against the limbs of age-matched able-bodied individuals while walking. Fourteen runners with a unilateral transfemoral amputation or knee-disarticulation were recruited and 14 age-matched able-bodied individuals were prepared using gait database. Spatiotemporal, kinematic, and kinetic parameters of walking were analyzed using a 3-demensional motion capture system.
The results showed that the peak ankle positive power at pre-swing and peak hip positive power from loading response to mid stance in the intact limb were significantly larger than that in the prosthetic limb. Moreover, to compensate for missing anatomical functions on the prosthetic limb, it appeared that the intact limb of the runners generated larger peak joint power by producing more ankle plantarflexor and hip extensor moments while walking.
This study demonstrated that the runners rely on their intact limb while walking. Training of hip extensor muscles of the intact limb may be beneficial for these individuals.
假肢使用者参与运动和娱乐活动时，跑步已成为常见的活动。然而，很少有研究描述过截肢者跑步时的运动学和动力学参数。因此，本研究试图阐明单侧股骨截肢或膝关节离断的跑步者的行走运动学和动力学。
本研究通过实验比较了跑步者假肢侧和健侧的肢体，并将这些发现与年龄匹配的健全个体的肢体进行了比较。共招募了 14 名单侧股骨截肢或膝关节离断的跑步者，并为 14 名年龄匹配的健全个体准备了步态数据库。使用三维运动捕捉系统分析了行走的时空、运动学和动力学参数。
结果表明，在健肢的预摆动阶段和从负重反应到中间站立阶段的踝关节正功率峰值，明显大于假肢侧。此外，为了补偿假肢侧缺失的解剖功能，跑步者的健肢似乎通过产生更大的踝关节跖屈肌和髋关节伸肌力矩来产生更大的关节功率峰值。
本研究表明，跑步者在行走时依赖于健肢。对健肢的髋伸肌进行训练可能对这些个体有益。
