Chang Hsun-Wen, Chieh Hsiao-Feng, Lin Chien-Ju, Su Fong-Chin, Tsai Ming-June
Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan; Department of Physical Therapy, Fooyin University, Kaohsiung, Taiwan.
Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.
PLoS One. 2014 Apr 15;9(4):e94535. doi: 10.1371/journal.pone.0094535. eCollection 2014.
The purpose of this study was to examine the correlation between the foot arch volume measured from static positions and the plantar pressure distribution during walking.
A total of 27 children, two to six years of age, were included in this study. Measurements of static foot posture were obtained, including navicular height and foot arch volume in sitting and standing positions. Plantar pressure, force and contact areas under ten different regions of the foot were obtained during walking.
The foot arch index was correlated (r = 0.32) with the pressure difference under the midfoot during the foot flat phase. The navicular heights and foot arch volumes in sitting and standing positions were correlated with the mean forces and pressures under the first (r = -0.296∼-0.355) and second metatarsals (r = -0.335∼-0.504) and midfoot (r = -0.331∼-0.496) during the stance phase of walking. The contact areas under the foot were correlated with the foot arch parameters, except for the area under the midfoot.
The foot arch index measured in a static position could be a functional index to predict the dynamic foot functions when walking. The foot arch is a factor which will influence the pressure distribution under the foot. Children with a lower foot arch demonstrated higher mean pressure and force under the medial forefoot and midfoot, and lower contact areas under the foot, except for the midfoot region. Therefore, children with flatfoot may shift their body weight to a more medial foot position when walking, and could be at a higher risk of soft tissue injury in this area.
本研究旨在探讨从静态姿势测量的足弓容积与步行过程中足底压力分布之间的相关性。
本研究共纳入27名2至6岁的儿童。获取静态足部姿势的测量数据，包括坐位和站立位的舟骨高度和足弓容积。在步行过程中获取足部十个不同区域的足底压力、力和接触面积。
足弓指数与足放平阶段中足下方的压力差相关（r = 0.32）。坐位和站立位的舟骨高度和足弓容积与步行支撑相期间第一跖骨（r = -0.296至-0.355）、第二跖骨（r = -0.335至-0.504）和中足（r = -0.331至-0.496）下方的平均力和压力相关。足底接触面积与足弓参数相关，但中足下方的面积除外。
在静态位置测量的足弓指数可能是预测步行时动态足部功能的功能指标。足弓是影响足底压力分布的一个因素。足弓较低的儿童在前足内侧和中足下方表现出较高的平均压力和力，而除中足区域外，足底接触面积较小。因此，扁平足儿童在行走时可能会将体重转移到足部更内侧的位置，并且该区域软组织损伤的风险可能更高。
