Huang Hongshi, Qiu Jianwei, Liu Tianlin, Yu Yuanyuan, Guo Qinwei, Luo Dingsheng, Ao Yingfang
Institute of Sports Medicine, Peking University Third Hospital, Beijing, People's Republic of China.
Key Laboratory of Machine Perception (Ministry of Education), Speech and Hearing Research Center, and Department of Machine Intelligence, School of Electronic Engineering and Computer Science, Peking University, Beijing, People's Republic of China.
PLoS One. 2017 Jan 10;12(1):e0169421. doi: 10.1371/journal.pone.0169421. eCollection 2017.
To evaluate the center of pressure (COP) progression similarity and its change during walking and jogging in Anterior Cruciate Ligament deficient (ACLD) patients.
A study was performed in 64 unilateral ACLD subjects and 32 healthy volunteers who walked and jogged on footscan® system at a self-selected speed. COP trajectory during walking and jogging was calculated. The robustness and similarity scores of COP (SSCOP, similarity scores with respect to corresponding COP trajectories) were computed, and then the Analysis of Variance test was employed to compare among different conditions (left or right side, within a subject or between subjects, walking or jogging).
(1) During the same motion status (walking or jogging), SSCOP were higher than 0.885. However, SSCOP between walking and jogging were lower than 0.25 in both the healthy and ACLD group. SSCOP between the intrasubjects were statistically higher than those between the intersubjects (p<0.01). (2) SSCOP in the ACLD group were statistically significantly reduced to 0.885±0.074 compared to 0.912±0.057 in healthy volunteers during walking, and 0.903±0.066 in the ACLD group compared to 0.919±0.050 in the healthy group during jogging (p<0.01).
SSCOP can distinguish walking from jogging, and SSCOP of ACLD patients would be different from that of healthy controls. The study protocol was approved by the Institutional Research Board of Peking University Third Hospital (IRB00006761-2012010).
评估前交叉韧带损伤（ACLD）患者在行走和慢跑过程中压力中心（COP）进展的相似性及其变化。
对64名单侧ACLD受试者和32名健康志愿者进行研究，他们以自选速度在footscan®系统上行走和慢跑。计算行走和慢跑过程中的COP轨迹。计算COP的稳健性和相似性得分（SSCOP，相对于相应COP轨迹的相似性得分），然后采用方差分析在不同条件（左侧或右侧、受试者内或受试者间、行走或慢跑）之间进行比较。
（1）在相同运动状态（行走或慢跑）下，SSCOP高于0.885。然而，健康组和ACLD组中行走和慢跑之间的SSCOP均低于0.25。受试者内的SSCOP在统计学上高于受试者间的SSCOP（p<0.01）。（2）与健康志愿者在行走时的0.912±0.057相比，ACLD组在行走时的SSCOP在统计学上显著降低至0.885±0.074，与健康组在慢跑时的0.919±0.050相比，ACLD组在慢跑时的SSCOP为0.903±0.066（p<0.01）。
SSCOP可以区分行走和慢跑，ACLD患者的SSCOP与健康对照组不同。该研究方案已获得北京大学第三医院机构研究委员会（IRB00006761-2012010）的批准。
