Department of Physical Therapy, University of Illinois at Chicago, Chicago, IL 60612, USA.
Division of Cardiovascular Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
Sensors (Basel). 2021 Apr 28;21(9):3065. doi: 10.3390/s21093065.
Inertial sensors (IS) enable the kinematic analysis of human motion with fewer logistical limitations than the silver standard optoelectronic motion capture (MOCAP) system. However, there are no data on the validity of IS for perturbation training and during the performance of dance. The aim of this present study was to determine the concurrent validity of IS in the analysis of kinematic data during slip and trip-like perturbations and during the performance of dance. Seven IS and the MOCAP system were simultaneously used to capture the reactive response and dance movements of fifteen healthy young participants (Age: 18-35 years). Bland Altman (BA) plots, root mean square errors (RMSE), Pearson's correlation coefficients (R), and intraclass correlation coefficients (ICC) were used to compare kinematic variables of interest between the two systems for absolute equivalency and accuracy. Limits of agreements (LOA) of the BA plots ranged from -0.23 to 0.56 and -0.21 to 0.43 for slip and trip stability variables, respectively. The RMSE for slip and trip stabilities were from 0.11 to 0.20 and 0.11 to 0.16, respectively. For the joint mobility in dance, LOA varied from -6.98-18.54, while RMSE ranged from 1.90 to 13.06. Comparison of IS and optoelectronic MOCAP system for reactive balance and body segmental kinematics revealed that R varied from 0.59 to 0.81 and from 0.47 to 0.85 while ICC was from 0.50 to 0.72 and 0.45 to 0.84 respectively for slip-trip perturbations and dance. Results of moderate to high concurrent validity of IS and MOCAP systems. These results were consistent with results from similar studies. This suggests that IS are valid tools to quantitatively analyze reactive balance and mobility kinematics during slip-trip perturbation and the performance of dance at any location outside, including the laboratory, clinical and home settings.
惯性传感器 (IS) 能够在运动分析中克服比光电运动捕捉 (MOCAP) 系统更少的物流限制。然而，目前还没有关于 IS 在扰动训练和舞蹈表演中进行运动分析的有效性的数据。本研究旨在确定 IS 在分析滑倒和绊倒样扰动期间以及在舞蹈表演过程中的运动学数据的同时效度。 七个 IS 和 MOCAP 系统同时用于捕捉十五名健康年轻参与者（年龄：18-35 岁）的反应性响应和舞蹈动作。Bland Altman (BA) 图、均方根误差 (RMSE)、皮尔逊相关系数 (R) 和组内相关系数 (ICC) 用于比较两个系统之间感兴趣的运动学变量的绝对等效性和准确性。BA 图的协议范围分别为 -0.23 至 0.56 和 -0.21 至 0.43，用于滑倒和绊倒稳定性变量。滑倒和绊倒稳定性的 RMSE 分别为 0.11 至 0.20 和 0.11 至 0.16。对于舞蹈中的关节活动度，LOA 范围为-6.98-18.54，而 RMSE 范围为 1.90-13.06。IS 和光电 MOCAP 系统在反应性平衡和身体节段运动学方面的比较表明，R 分别为 0.59-0.81 和 0.47-0.85，ICC 分别为 0.50-0.72 和 0.45-0.84，用于滑倒-绊倒扰动和舞蹈。IS 和 MOCAP 系统具有中等至高的同时效度。这些结果与类似研究的结果一致。这表明，IS 是在滑倒-绊倒干扰和舞蹈表演过程中定量分析反应性平衡和运动学的有效工具，可在实验室、临床和家庭等任何外部场所使用。
