McPoil Thomas G, Ford Jessica, Fundaun Joel, Gallegos Chelsea, Kinney Andrew, McMillan Peter, Murphy Jessica, Sky Elliot, Torba Derrick, Bade Michael
School of Physical Therapy, Regis University, Denver, CO, United States.
School of Physical Therapy, Regis University, Denver, CO, United States.
Foot (Edinb). 2016 Aug;28:47-53. doi: 10.1016/j.foot.2016.09.001. Epub 2016 Sep 20.
Previous studies have successfully used the longitudinal arch angle (LAA) to assess foot posture, but the measurement consistency and ability of the LAA to predict dynamic foot posture during activity in a variety of foot types have not been evaluated. The purpose of this study was to determine the reliability of the LAA as well as if the clinical method of assessing the LAA could be used to predict the LAA at midstance during walking for supinated, normal, and pronated foot types. The Arch Height Ratio was used to select 35 participants with 12 supinated, 46 normal, and 12 pronated feet. A standard goniometer was used to measure the LAA (CLINIC_LAA) on both feet while standing. Both feet were then filmed using a high speed camera while walking on a treadmill. The LAA was determined by the angle formed by two lines drawn between the markers placed on the first metatatarsal and medial malleolus with the apex the navicular tuberosity. The LAA in midstance (WALK_LAA) was determined using the mean of five walking trials. The reliability of the CLINIC_LAA assessed on both feet by two raters over two days were excellent. There was no difference between the left and right foot for the CLINIC_LAA. The Pearson correlation between CLINIC_LAA and WALK_LAA for all 70 feet was r=0.96 (r=0.92). The results indicate the LAA is highly predictive of foot posture at midstance in walking explaining over 90% of the variance for a wide range of foot types.
以往的研究已成功地使用纵弓角度（LAA）来评估足部姿势，但尚未评估LAA在各种足型活动期间预测动态足部姿势的测量一致性和能力。本研究的目的是确定LAA的可靠性，以及评估LAA的临床方法是否可用于预测旋后足、正常足和旋前足在行走中足中部的LAA。使用足弓高度比从35名参与者中选出12只旋后足、46只正常足和12只旋前足。站立时使用标准测角仪测量双脚的LAA（CLINIC_LAA）。然后让双脚在跑步机上行走时用高速摄像机拍摄。LAA由在第一跖骨和内踝上放置的标记之间绘制的两条线与舟骨结节顶点形成的角度确定。足中部的LAA（WALK_LAA）通过五次行走试验的平均值来确定。两名评估者在两天内对双脚评估的CLINIC_LAA的可靠性极佳。CLINIC_LAA的左右脚之间没有差异。所有70只脚的CLINIC_LAA与WALK_LAA之间的Pearson相关性为r = 0.96（r = 0.92）。结果表明，LAA对行走中足中部的足部姿势具有高度预测性，可解释广泛足型中超过90%的差异。
