IEEE Trans Neural Syst Rehabil Eng. 2018 Jul;26(7):1400-1406. doi: 10.1109/TNSRE.2018.2843884.
The functional reach test (FRT) is widely used for assessing dynamic balance stability in elderly and pathological subjects. Force platforms (FPs) represent a fundamental part of the instrumented FRT experimental setup due to the central role of center-of-pressure (COP) displacement in FRT analysis. Recently, the nintendo wii balance board (NBB) has been suggested as a low-cost and reliable device for ground reaction force and COP measurement in poorly dynamic motor tasks. Therefore, this paper aimed to compare NBB-COP data with those obtained from a laboratory-grade platform during FRT. Data from 48 healthy subjects were simultaneously acquired from both devices. FP-COP and NBB-COP trajectories showed a remarkable correlation in both directions ( ) and low root-mean-square error values (1.14 ± 0.88 mm and 0.55 ± 0.28 mm for anterior-posterior and medial-lateral direction). Fixed biases between COP-based parameters did not exceed 2% of the FP outcomes with high consistency throughout the present measurement range (ICC consistency always >0.950). Only the COP mean velocity exhibited a tendency toward proportional errors, which can be adjusted by a calibration of NBB data. Findings of this paper confirmed the NBB validity for COP measurement in a widely used motor task as the functional reach, supporting the feasibility of NBB in research scenarios.
功能性伸展测试（FRT）广泛用于评估老年人和病理受试者的动态平衡稳定性。力平台（FPs）是仪器化 FRT 实验设置的基本组成部分，因为在 FRT 分析中，压力中心（COP）位移起着核心作用。最近，任天堂 Wii 平衡板（NBB）已被提议作为一种低成本且可靠的设备，用于在动态性较差的运动任务中测量地面反作用力和 COP。因此，本文旨在比较 NBB-COP 数据与 FRT 期间从实验室级平台获得的数据。来自 48 名健康受试者的数据同时从两个设备中获取。FP-COP 和 NBB-COP 轨迹在两个方向上都表现出显著的相关性（），并且均方根误差值较低（1.14 ± 0.88 mm 和 0.55 ± 0.28 mm，用于前后方向和左右方向）。基于 COP 的参数之间的固定偏差不超过 FP 结果的 2%，在整个当前测量范围内具有高度一致性（ICC 一致性始终>0.950）。仅 COP 平均速度表现出比例误差的趋势，可以通过校准 NBB 数据进行调整。本文的研究结果证实了 NBB 在广泛使用的运动任务（如功能性伸展）中用于 COP 测量的有效性，支持了 NBB 在研究场景中的可行性。
