Kernozek T W, LaMott E E, Dancisak M J
Division of Kinesiology, University of Minnesota, Minneapolis 55455, USA.
Foot Ankle Int. 1996 Apr;17(4):204-9. doi: 10.1177/107110079601700404.
We examined the reliability of in-shoe foot pressure measurement using the Pedar in-shoe pressure measurement system for 25 participants walking at treadmill speeds of 0.89, 1.12, and 1.34 meters/sec. The measurement system uses EMED insoles, which consist of 99 capacitive sensors, sampled at 50 Hz. Data were collected for 20 seconds at two separate times while participants walked at each gait speed. Differences in some of the loading variables across speed relative to the total foot and across the different anatomical regions were detected. Different anatomical regions of the foot were loaded differently with variations in walking speed. The results indicated the need to control speed when evaluating loading parameters using in-shoe pressure measurement techniques. Coefficients of reliability were calculated. Variables such as peak force for the total foot required two steps to achieve a coefficient of reliability of 0.98. To achieve excellent reliability (> 0.90) in the peak force, force time integral, peak pressure, and pressure time integral across the total foot and the seven regions, a maximum of eight steps was needed. In general, timing variables, such as the instant of peak force and the instant of peak pressure, tended to be the least reliable measures.
我们使用Pedar鞋内压力测量系统，对25名参与者在跑步机上以0.89、1.12和1.34米/秒的速度行走时鞋内足部压力测量的可靠性进行了研究。该测量系统使用EMED鞋垫，其由99个电容式传感器组成，以50赫兹的频率进行采样。在参与者以每种步态速度行走时，在两个不同的时间点收集了20秒的数据。检测到了一些加载变量在不同速度下相对于整个足部以及不同解剖区域的差异。足部的不同解剖区域在行走速度变化时加载方式不同。结果表明，在使用鞋内压力测量技术评估加载参数时需要控制速度。计算了可靠性系数。整个足部的峰值力等变量需要两步才能达到0.98的可靠性系数。要在整个足部和七个区域的峰值力、力时间积分、峰值压力和压力时间积分方面实现出色的可靠性（>0.90），最多需要八步。一般来说，诸如峰值力瞬间和峰值压力瞬间等时间变量往往是最不可靠的测量指标。
