School of Lifelong Sport, Hokusho University, Japan.
Gait Posture. 2013 May;38(1):132-5. doi: 10.1016/j.gaitpost.2012.11.002. Epub 2012 Dec 7.
The dynamic quantification of jump ability is useful for sports performance evaluation. We developed a force measurement system using the Wii Balance Board (WBB). This study was conducted to validate the system in comparison with a laboratory-grade force plate (FP). For a static validation, weights of 10-180kg were put progressively on the WBB put on the FP. The vertical component of the ground reaction force (vGRF) was measured using both devices and compared. For the dynamic validation, 10 subjects without lower limb pathology participated in the study and performed vertical jumping twice on the WBB on the FP. The range of analysis was set from the landing after the first jump to taking off of the second jump. The peak values during the landing phase and jumping phase were obtained and the force-time integral (force impulse) was measured. The relations of the values measured using each device were compared using Pearson's correlation coefficient test and Bland-Altman plots (BAP). Significant correlation (P<.01, r=.99) was found between the values of both devices in the static and the dynamic test. Examination of the BAP revealed a proportion error in the landing phase and showed no relation in the jumping phase between the difference and the mean in the dynamic test. The WBB detects the vGRF in the jumping phase with high precision.
跳能力的动态量化对于运动表现评估很有用。我们使用 Wii 平衡板（WBB）开发了一种力测量系统。本研究旨在将该系统与实验室级力板（FP）进行比较，以验证其有效性。在静态验证中，将 10-180kg 的重量逐步放在放在 FP 上的 WBB 上。使用这两种设备测量垂直地面反作用力（vGRF）的垂直分量，并进行比较。在动态验证中，10 名无下肢病理的受试者参与了研究，在 WBB 上进行了两次垂直跳跃，在 FP 上进行了两次垂直跳跃。分析范围设定为第一次跳跃后的着陆到第二次跳跃的起飞。获得着陆阶段和跳跃阶段的峰值值，并测量力-时间积分（力冲量）。使用 Pearson 相关系数检验和 Bland-Altman 图（BAP）比较两种设备测量值之间的关系。静态和动态测试中，两种设备的值之间存在显著相关性（P<.01，r=.99）。BAP 检查显示，在着陆阶段存在比例误差，在跳跃阶段，动态测试中差异与平均值之间没有关系。WBB 以高精度检测跳跃阶段的 vGRF。
