Division of Intelligent and Bio-Mimetic Machinery, The State Key Laboratory of Tribology, Tsinghua University, Beijing, China.
Shenzhen Second People's Hospital, Shenzhen, China.
J Healthc Eng. 2019 Oct 15;2019:3812407. doi: 10.1155/2019/3812407. eCollection 2019.
The purpose of the study was to investigate the pelvis-hip biomechanics and trunk and lower limb muscle activity patterns between healthy people walking in two gaits and evaluate the effects of ankle joint motion on these two gaits. The two gaits included walking with combined knee and ankle immobilization and with individual knee immobilization. Ten healthy participants were recruited and asked to walk along a 10 m walk away at their comfortable speeds in the two gaits. Kinematic data, ground reaction force, and electromyography waveforms of trunk and lower limb muscles on the right side were collected synchronously. Compared to individual knee immobilization gait, people walking in the combined knee and ankle immobilization gait increased the range and average angle of the anterior pelvic tilt during the first double support and the single support phase, respectively. The combined knee and ankle immobilization gait also increased the range of hip abduction during the second double support phase. These kinematic alternations caused changes in trunk and lower limb muscle activity patterns. The ankle immobilization increased the range of gluteus maximus activation in the first double support phase, the range of rectus abdominis activation, the average amplitude of rectus femoris activation in the single support phase, and the range of rectus femoris activation in swing phase and decreased the range of and tibialis anterior activation in the first double support phase. The ankle immobilization also increased the average values of proximodistal component in AKI gait during the single support phase. This study revealed significant differences in pelvis-hip biomechanics and trunk and lower limb muscle activity patterns between the two gaits.
本研究旨在探讨健康人在两种步态下的骨盆-髋部生物力学和躯干及下肢肌肉活动模式，并评估踝关节运动对这两种步态的影响。这两种步态包括膝关节和踝关节联合固定行走和膝关节单独固定行走。招募了 10 名健康参与者，要求他们以舒适的速度在两种步态下沿 10m 步道行走。同步采集右侧躯干和下肢肌肉的运动学数据、地面反力和肌电图波形。与膝关节单独固定步态相比，联合膝关节和踝关节固定步态分别增加了第一双支撑和单支撑阶段前骨盆倾斜的范围和平均角度。联合膝关节和踝关节固定步态还增加了第二双支撑阶段髋关节外展的范围。这些运动学的改变导致了躯干和下肢肌肉活动模式的变化。踝关节固定增加了第一双支撑阶段臀大肌激活的范围、腹直肌激活的范围、单支撑阶段股直肌激活的平均幅度、摆动阶段股直肌激活的范围，并减少了第一双支撑阶段胫骨前肌激活的范围。踝关节固定还增加了单支撑阶段 AKI 步态中的远近分量的平均值。本研究揭示了两种步态下骨盆-髋部生物力学和躯干及下肢肌肉活动模式的显著差异。
