Van Gheluwe Bart, Dananberg Howard J
Laboratory of Biomechanics, Vrije Universiteit Brussel, Brussels, Belgium.
J Am Podiatr Med Assoc. 2004 Jan-Feb;94(1):1-11. doi: 10.7547/87507315-94-1-1.
Varus and valgus wedging are commonly used by podiatric physicians in therapy with custom-made foot orthoses. This study aimed to provide scientific evidence of the effects on plantar foot pressure of applying in-shoe forefoot or rearfoot wedging. The plantar foot pressure distribution of 23 subjects walking on a treadmill was recorded using a pressure insole system for seven different wedging conditions, ranging from 3 degrees valgus to 6 degrees varus for the forefoot and from 4 degrees valgus to 8 degrees varus for the rearfoot. The results demonstrate that increasing varus wedging magnifies peak pressure and maximal loading rate at the medial forefoot and rearfoot, whereas increasing valgus wedging magnifies peak pressure and maximal loading rate at the lateral forefoot and rearfoot. As expected, the location of the center of pressure shifts medially with varus wedging and laterally with valgus wedging. However, these shifts are less significant than those in peak load and maximal loading rate. Timing variables such as interval from initial impact to peak load do not seem to be affected by forefoot or rearfoot wedging. Finally, rearfoot wedging does not significantly influence pressure variables of the forefoot; similarly, rearfoot pressure remains unaffected by forefoot wedging.
内翻和外翻楔形矫正通常被足病医生用于定制足部矫形器的治疗中。本研究旨在为在前足或后足应用鞋内楔形矫正对足底压力的影响提供科学依据。使用压力鞋垫系统记录了23名受试者在跑步机上行走时，七种不同楔形矫正条件下的足底压力分布情况，前足的楔形角度范围为3度外翻至6度内翻，后足的楔形角度范围为4度外翻至8度内翻。结果表明，增加内翻楔形矫正会使前足内侧和后足的峰值压力和最大负荷率增大，而增加外翻楔形矫正会使前足外侧和后足的峰值压力和最大负荷率增大。正如预期的那样，压力中心的位置在内翻楔形矫正时向内移动，在外翻楔形矫正时向外移动。然而，这些移动比峰值负荷和最大负荷率的移动不太明显。诸如从初始冲击到峰值负荷的时间间隔等时间变量似乎不受前足或后足楔形矫正的影响。最后，后足楔形矫正不会显著影响前足的压力变量；同样，后足压力也不受前足楔形矫正的影响。
