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通过建立以冰刀铰链为转动原点的下肢关节点蹬伸模型,揭示了下肢关节在蹬冰过程中伸膝压踝技术的作用。结果认为:踝关节从开始至80%阶段是以提供稳定的支撑作用为主,仅在80%阶段以后特别是从90%～100%阶段内完成动力蹬伸;就膝关节点而言,右侧肢体前倾下压动作更为突出,正是由于左右腿伸膝压踝作用方式上的不同,决定了在蹬冰过程中重心沿切线方向上前移程度间的差异;下肢关节的发力顺序是髋、膝、踝,蹬伸的有效范围依次为55°～98°、98°～143°、72°～100°。
By establishing a knee-joint model of knee joint with ice-knife hinge as the turning point, the effect of knee-ankle-knee technique on knee joint during pedaling is revealed. The results show that: the ankle from the beginning to 80% of the stage is to provide a stable role in supporting the main, only after 80% of the stage, especially from 90% to 100% of the stage to complete power kicking; the knee point, the right It is because of the difference in the mode of action on the knee and ankle between the left and right leg, which determines the difference between the forward shift of the center of gravity along the tangential direction during pedal ice-breaking. The force of lower extremity joint The order is the hip, knee, ankle, pedal extension of the effective range of 55 ° ~ 98 °, 98 ° ~ 143 °, 72 ° ~ 100 °.