PDF(Pubmed)
Abstract：
BACKGROUND: Foot kinematics, such as excessive eversion and malalignment of the hindfoot, are believed to be associated with running-related injuries. The majority of studies to date show that different foot strike patterns influence these specific foot and ankle kinematics. However, technical deficiencies in traditional motion capture approaches limit knowledge of in vivo joint kinematics with respect to rearfoot and forefoot strike patterns (RFS and FFS, respectively). This study uses a high-speed dual fluoroscopic imaging system (DFIS) to determine the effects of different foot strike patterns on 3D in vivo tibiotalar and subtalar joints kinematics.
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.
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.
摘要：
背景：脚运动学，例如后脚过度外翻和错位，被认为与跑步相关的伤害有关。迄今为止的大多数研究表明，不同的足部撞击模式会影响这些特定的足部和踝关节运动学。然而,传统运动捕获方法的技术缺陷限制了体内关节运动学关于后足和前足打击模式的知识(RFS和FFS，分别)。本研究使用高速双荧光成像系统（DFIS）来确定不同的足部撞击模式对3D体内胫骨和距下关节运动学的影响。
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。
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。
