J Am Podiatr Med Assoc. 2021 Dec 15;111(6). doi: 10.7547/18-057.
Plantar pressure plate instruments are commonly used in clinical practice and biomechanical analysis and are useful to establish a relationship between gait disorders and foot pressure. The aim of this study was to verify the reliability and repeatability of the Footwork pressure plate system for static and dynamic conditions.
Forty healthy adults, without apparent gait pathology, were recruited. For the static condition, participants were asked to stand static on the Footwork pressure plate for 5 sec in natural position (arms on either side of the body, feet shoulder-width apart in a comfortable angle, and looking ahead). For the dynamic condition, subjects were told to step five times with each foot on the plate following the three-step protocol. Both conditions were performed in two testing sessions spaced by 1 week.
Intrasession and intersession reliability for both conditions showed substantial to almost perfect intraclass correlation coefficient (ICC) values, and low coefficient of variation, low standard error measure, and low percentage error. Intrasession ICCs were 0.724 to 0.993 for static condition evaluation and 0.639 to 0.986 for dynamic condition evaluation. Intersession reliability ICCs ranged from 0.850 to 0.987 for the static condition and from 0.781 to 0.996 for the dynamic condition. Coefficient of variation values were below 8% in both cases and percentage error calculated from standard error measure were less than 10%.
The present work demonstrates that the Footwork plantar pressure plate system is a reliable instrument for collecting plantar pressures in static and dynamic conditions. Reliability data were higher for the static trials, probably because of the individual physiologic fluctuations, which are larger during dynamic gait. Reliability for intersession and average intrasession trials were higher than single-test reliability. The results from the present work can be used as a starting point for future research and to establish a basis for sample sizes for investigations that would use the Footwork platform.
足底压力板仪器在临床实践和生物力学分析中被广泛应用，有助于建立步态障碍与足底压力之间的关系。本研究旨在验证 Footwork 足底压力板系统在静态和动态条件下的可靠性和可重复性。
招募了 40 名健康成年人，无明显步态异常。对于静态条件，要求参与者在自然姿势下在 Footwork 足底压力板上站立 5 秒钟（手臂放在身体两侧，双脚分开与肩同宽，保持舒适的角度，向前看）。对于动态条件，要求受试者按照三步协议用每只脚在板上各踏 5 次。两种情况均在间隔 1 周的 2 次测试中进行。
两种情况的组内和组间可靠性均显示出高度到几乎完美的组内相关系数（ICC）值，以及低变异系数、低标准误测量值和低百分比误差。静态条件评估的组内 ICC 值为 0.724 至 0.993，动态条件评估的组内 ICC 值为 0.639 至 0.986。静态条件的组间可靠性 ICC 值范围为 0.850 至 0.987，动态条件的组间可靠性 ICC 值范围为 0.781 至 0.996。两种情况下的变异系数值均低于 8%，标准误测量值计算的百分比误差均小于 10%。
本研究表明，Footwork 足底压力板系统是一种可靠的仪器，可用于收集静态和动态条件下的足底压力。静态试验的可靠性数据较高，可能是由于个体生理波动较大，而动态步态时生理波动更大。组间和平均组内试验的可靠性高于单次试验的可靠性。本研究的结果可作为未来研究的起点，并为使用 Footwork 平台进行研究的样本量建立基础。
