Murphy Darlene F, Beynnon Bruce D, Michelson James D, Vacek Pamela M
McClure Musculoskeletal Research Center, Department of Orthopaedics and Rehabilitation, University of Vermont, Burlington, VT 05405, USA.
Foot Ankle Int. 2005 Feb;26(2):171-9. doi: 10.1177/107110070502600210.
The purpose of this study was to determine plantar pressure and contact areas of the foot inside the athletic shoe during activity. The objectives were to determine if plantar pressure and contact area measurements collected on multiple trials from the same subject were reliable, to determine the variability of measurements between subjects as compared to that found between steps within a single subject, to determine the relationship between contact area and plantar pressure, and to ascertain whether there were any systematic gender differences in these measurements.
Sixteen healthy adults volunteered for participation in the first part of the study that was designed to determine reliability and variability of the testing methodology. A separate group of fifty healthy high school and collegiate athletes participating in soccer, field hockey, basketball, and lacrosse comprised the second part of the study that was designed to investigate gender differences in terms of normalized midfoot plantar pressure and contact area, and the interrelationship between the two measurements. Data were collected during the midstance phase of gait, using the Pedar in-shoe measurement system (Novel GMBH, St. Paul, MN). Athletes wore their own athletic shoes and performed walking trials on a surface similar to that used in their sport. The foot was divided into four regions based on radiographic measurements.
The midfoot region demonstrated excellent reliability across multiple trials of the same subject in contact area and plantar pressure, and the variability between steps within a single subject was small when compared to that between subjects. Normalized midfoot contact area and plantar pressure values were highly correlated with r values of 0.862 on the left foot and .912 on the right foot. No significant differences were found in normalized midfoot contact area or plantar pressure values between males and females.
The Pedar in-shoe pressure measurement system can be used reliably to quantify contact area and plantar pressure beneath the midfoot region during the midstance phase of gait. This measurement technique can now be used in risk factor studies designed to identify individuals at risk for injury to the foot, ankle, and other lower extremity structures.
本研究的目的是确定运动过程中运动鞋内足部的足底压力和接触面积。目标包括确定同一受试者多次试验收集的足底压力和接触面积测量值是否可靠，确定受试者之间测量值的变异性与单个受试者不同步之间的变异性相比情况，确定接触面积与足底压力之间的关系，以及确定这些测量中是否存在任何系统性的性别差异。
16名健康成年人自愿参与旨在确定测试方法可靠性和变异性的研究的第一部分。另一组由50名参加足球、曲棍球、篮球和长曲棍球的健康高中和大学运动员组成，他们参与了研究的第二部分，该部分旨在调查标准化中足足底压力和接触面积方面的性别差异以及这两项测量之间的相互关系。使用鞋内测量系统Pedar（Novel GMBH，明尼苏达州圣保罗）在步态的支撑中期收集数据。运动员穿着自己的运动鞋，在与其运动中使用的表面相似的地面上进行步行试验。根据X射线测量将足部分为四个区域。
中足区域在同一受试者的多次试验中，接触面积和足底压力显示出极好的可靠性，与受试者之间的变异性相比，单个受试者不同步之间的变异性较小。标准化中足接触面积和足底压力值高度相关，左脚的r值为0.862，右脚的r值为0.912。男性和女性在标准化中足接触面积或足底压力值方面未发现显著差异。
鞋内压力测量系统Pedar可可靠地用于量化步态支撑中期中足区域下方的接触面积和足底压力。这种测量技术现在可用于风险因素研究，以识别足部、踝关节和其他下肢结构有受伤风险的个体。
