Validity and reproducibility of foot motion analysis using a stretch strain sensor
Validity and reproducibility of foot motion analysis using a stretch strain sensor
复制标题
使用拉伸应变传感器进行足部运动分析的有效性和可重复性
DOI：
10.1016/j.gaitpost.2021.03.007
复制
发表时间：
2021
期刊：
影响因子：
2.4
通讯作者：
Kudo S
中科院分区：
文献类型：
--
作者：
Sakamoto K, Tsujioka C;Sasaki M;Miyashita T;Kitano M;Kudo S
背景传统上，当受试者穿着鞋或足部矫形器时，多节段足部分析很难进行，并且难以应用于临床环境。最近开发的薄型且高度灵活的拉伸应变传感器（STR）可能会解决这一限制，因为它不需要使用相机进行观察并且高度便携。研究问题本研究旨在通过与传统的运动捕捉系统进行比较，检查使用 STR 在步行和跑步过程中进行足部运动分析的再现性和有效性。方法本研究对 21 名健康参与者进行了检查。在单独的实验中，将 STR 放置在参与者脚上的两个位置之一（弹簧韧带；SL 和舟骨下降；ND 方法）。使用 STR 和三维运动捕捉系统同时记录步行和跑步期间的足部运动数据。组内相关性 (ICC) 用于评估 STR 方法的重测重现性。互相关系数评估两个系统之间信号模式的相似性。采用Pearson和Spearman相关分析评估STR测量值与前足或后足角度偏移之间的关系。结果步行和跑步时SL法的ICC分别为0.95和0.96，ND法的ICC分别为0.93和0.71。在 SL 方法中，STR 和前足额叶运动之间的信号模式密切相关。 STR 测量值与前足外翻偏移显着相关（步行：r=-0.67，跑步：r=-0.64，p < 0.01）。在ND方法中，STR信号与前足和后足运动学无关。意义我们的结果表明STR对于足部运动分析具有可接受的再现性和有效性。该系统可以在受试者穿着鞋子和在实验室外时测量脚部运动。
BackgroundMulti-segment foot analysis is traditionally challenging to perform while subjects are wearing footwear or a foot orthosis and is difficult to apply in the clinical setting. A recently developed stretch strain sensor (STR), that is thin and highly flexible, may solve this limitation because it does not require observation using a camera and is highly portable.Research questionThis study aimed to examine the reproducibility and validity of foot motion analysis using the STR during walking and running by comparing it with a conventional motion capture system.MethodsTwenty-one healthy participants were examined in this study. The STR was placed on the participant's foot in one of two locations in separate experiments (spring ligament; SL and navicular drop; ND methods). Foot kinematic data during walking and running were simultaneously recorded using the STR and a three-dimensional motion capture system. Intra-class correlation (ICC) was used to assess test-retest reproducibility of the STR method. Cross-correlation coefficient evaluated the similarity of the pattern of the signals between the two systems. Pearson and Spearman correlation analysis was used to evaluate the relationships between the STR measurement and angular excursion of the forefoot or hindfoot.ResultsThe ICCs of the SL method were 0.95 and 0.96, and those of the ND method were 0.93 and 0.71 during walking and running, respectively. In the SL method, the pattern of the signals between the STR and forefoot frontal motion was strongly correlated. The STR measurement was significantly correlated with forefoot eversion excursion (walking: r=-0.67, running: r=-0.64, p < 0.01 each). In the ND method, the STR signal was not associated with forefoot and hindfoot kinematics.SignificanceOur results showed that the STR has acceptable reproducibility and validity of foot motion analysis. This system may enable measurement of foot motion while subjects are wearing shoes and outside the laboratory.