Faculty of Physical Culture, Palacký University Olomouc, třída Míru 117, Olomouc, 77147, Czech Republic.
Allied Health Research Unit, University of Central Lancashire, Preston, PR1 2HE, UK.
J Foot Ankle Res. 2022 Sep 8;15(1):68. doi: 10.1186/s13047-022-00574-z.
Different multi-segment foot models have been used to explore the effect of foot orthoses. Previous studies have compared the kinematic output of different multi-segment foot models, however, no study has explored if different multi-segment foot models detect similar kinematic changes when wearing a foot orthoses. The aim of this study was to compare the ability of two different multi-segment foot models to detect kinematic changes at the hindfoot and forefoot during the single and double support phases of gait when wearing a foot orthosis.
Foot kinematics were collected during walking from a sample of 32 individuals with and without a foot orthosis with a medial heel bar using an eight-camera motion capture system. The Oxford Foot Model (OFM) and a multi-segment foot model using the Calibrated Anatomical System Technique (CAST) were applied simultaneously. Vector field statistical analysis was used to explore the kinematic effects of a medial heel bar using the two models, and the ability of the models to detect any changes in kinematics was compared.
For the hindfoot, both models showed very good agreement of the effect of the foot orthosis across all three anatomical planes during the single and double support phases. However, for the forefoot, the level of agreement between the models varied with both models showing good agreement of the effect in the coronal plane but poorer agreement in the transverse and sagittal planes.
This study showed that while consistency exists across both models for the hindfoot and forefoot in the coronal plane, the forefoot in the transverse and sagittal planes showed inconsistent responses to the foot orthoses. This should be considered when interpreting the efficacy of different interventions which aim to change foot biomechanics.
不同的多段足模型已被用于探索足矫形器的效果。先前的研究比较了不同多段足模型的运动学输出，但尚无研究探讨当佩戴足矫形器时，不同的多段足模型是否能检测到相似的运动学变化。本研究的目的是比较两种不同的多段足模型在佩戴足矫形器时，在步态的单足和双足支撑阶段检测后足和前足运动学变化的能力。
使用八摄像机运动捕捉系统，从 32 名有和无足矫形器的个体的行走中收集足部运动学数据，其中使用内侧跟骨条带固定。同时应用牛津足模型（OFM）和使用校准解剖系统技术（CAST）的多段足模型。矢量场统计分析用于研究两种模型的内侧跟骨条带的运动学效应，并比较模型检测运动学变化的能力。
在后足，两种模型在单足和双足支撑阶段的所有三个解剖平面上均显示出对足矫形器的效果非常一致。然而，在前足，两种模型之间的一致性水平因模型而异，两种模型在冠状面显示出良好的效果一致，但在横断面和矢状面显示出较差的效果一致。
本研究表明，虽然在冠状面时，两种模型在后足和前足均存在一致性，但在横断面和矢状面时，前足对足矫形器的反应不一致。在解释旨在改变足部生物力学的不同干预措施的效果时，应考虑到这一点。
