METHODS: Fifteen healthy male recreational runners underwent foot computed tomography scanning for the construction of 3-dimensional models. A high-speed DFIS (100 Hz) was used to collect 6 degrees of freedom kinematics for participants\' tibiotalar and subtalar joints when they adopted RFS and FFS in barefoot condition.
RESULTS: Compared with RFS, FFS exhibited greater internal rotation at 0%-20% of the stance phase in the tibiotalar joint. The peak internal rotation angle of the tibiotalar joint under FFS was greater than under RFS (p < 0.001, Cohen\'s d = 0.92). RFS showed more dorsiflexion at 0%-20% of the stance phase in the tibiotalar joint than FFS. RFS also presented a larger anterior translation (p < 0.001, Cohen\'s d = 1.28) in the subtalar joint at initial contact than FFS.
CONCLUSIONS: Running with acute barefoot FFS increases the internal rotation of the tibiotalar joint in the early stance. The use of high-speed DFIS to quantify the movement of the tibiotalar and subtalar joint was critical to revealing the effects of RFS and FFS during running.
方法:15名健康的男性休闲跑步者接受了足部CT扫描以构建3D模型。在赤脚条件下采用RFS和FFS时,使用高速DFIS(100Hz)为参与者的胫骨和距下关节收集6个自由度运动学。
结果:与RFS相比,在胫骨关节中,FFS在站立阶段的0%-20%表现出更大的内旋。FFS下胫骨关节的峰值内旋转角大于RFS下(p<0.001,Cohen\sd=0.92)。RFS在胫骨关节站立期的0%-20%时显示出比FFS更多的背屈。与FFS相比,RFS在初始接触时距下关节的前平移更大(p<0.001,Cohen\sd=1.28)。
结论:使用急性赤足FFS跑步会增加早期站立时胫骨关节的内旋。使用高速DFIS量化胫骨和距下关节的运动对于揭示跑步过程中RFS和FFS的影响至关重要。