Using horizontal heel displacement to identify heel strike instants in normal gait
Using horizontal heel displacement to identify heel strike instants in normal gait
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DOI：
10.1016/j.gaitpost.2015.03.015
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发表时间：
2015-06-01
期刊：
影响因子：
2.4
通讯作者：
Chang, Chien-Chi
中科院分区：
文献类型：
--
作者：
Banks, Jacob J.;Chang, Wen-Ruey;Chang, Chien-Chi
脚跟撞击瞬间是步态分析的重要组成部分，但如果没有测力板，准确检测可能很困难。本文提出了两种新的技术，运动脚跟着地瞬间（kHSI）检测检查最大合成水平脚跟位移（HHD）。这些HHD技术中的每一种都计算从站立踝部或站立脚跟的选定参考位置到摆动脚跟的HHD。针对10 N测力板阈值，对所提出的技术沿着其他先前建立的技术进行了验证。54名健康成年人穿着运动鞋以正常速度和快速速度在地上行走。当使用站立踝关节作为参考时，在8678 kHSI范围内，报告的真实和绝对误差分别低至3.2（4.4）和5.7（3.4）ms，显著优于（p < 0.0001）已建立的技术。步态速度被证明对HHD测定的kHSI以及评估的其他三种技术具有显著影响（p < 0.0001），突出了对kHSI的条件特异性鉴定的需要。(C)2015年，作者。由爱思唯尔公司出版
Heel strike instants are an important component of gait analyses, yet accurate detection can be difficult without a force plate. This paper presents two novel techniques for kinematic heel strike instant (kHSI) detection which examined maximal resultant horizontal heel displacement (HHD). Each of these HHD techniques calculates HHD from a selected reference location of either the stance ankle or stance heel to the swing heel. The proposed techniques, along with other previously established techniques, were validated against a 10 N force plate threshold. Fifty-four healthy adults walked overground at both normal and fast speeds while wearing athletic shoes. The reported true and absolute errors were as low as 3.2 (4.4) and 5.7 (3.4) ms, respectively, across 8678 kHSI when using the stance ankle as a reference, which significantly outperformed (p < 0.0001) the established techniques. Gait speed was shown to have a significant effect (p < 0.0001) on HHD-determined kHSI, as well as the three other techniques evaluated, highlighting the need for condition-specific identification of kHSI. (C) 2015 The Authors. Published by Elsevier B.V.