Centre for Health, Exercise and Sports Medicine, Department of Physiotherapy, The University of Melbourne, Australia.
J Sci Med Sport. 2011 Mar;14(2):177-82. doi: 10.1016/j.jsams.2010.12.001. Epub 2011 Jan 17.
Commercial timing light systems (CTLS) provide precise measurement of athletes running velocity, however they are often expensive and difficult to transport. In this study an inexpensive, wireless and portable timing light system was created using the infrared camera in Nintendo Wii hand controllers (NWHC).
System creation with gold-standard validation.
A Windows-based software program using NWHC to replicate a dual-beam timing gate was created. Firstly, data collected during 2m walking and running trials were validated against a 3D kinematic system. Secondly, data recorded during 5m running trials at various intensities from standing or flying starts were compared to a single beam CTLS and the independent and average scores of three handheld stopwatch (HS) operators. Intraclass correlation coefficient and Bland-Altman plots were used to assess validity. Absolute error quartiles and percentage of trials in absolute error threshold ranges were used to determine accuracy.
The NWHC system was valid when compared against the 3D kinematic system (ICC=0.99, median absolute error (MAR)=2.95%). For the flying 5m trials the NWHC system possessed excellent validity and precision (ICC=0.97, MAR<3%) when compared with the CTLS. In contrast, the NWHC system and the HS values during standing start trials possessed only modest validity (ICC<0.75) and accuracy (MAR>8%).
A NWHC timing light system is inexpensive, portable and valid for assessing running velocity. Errors in the 5m standing start trials may have been due to erroneous event detection by either the commercial or NWHC-based timing light systems.
商业定时灯光系统（CTLS）可提供运动员跑步速度的精确测量，但价格昂贵且难以运输。本研究利用任天堂 Wii 手持控制器（NWHC）中的红外摄像头，创建了一种经济实惠、无线且便携的定时灯光系统。
具有黄金标准验证的系统创建。
创建了一个基于 Windows 的软件程序，该程序使用 NWHC 复制双光束定时门。首先，通过与 3D 运动学系统进行验证，收集了在 2 米步行和跑步试验中收集的数据。其次，比较了在各种强度下从站立或起跑开始的 5 米跑步试验中记录的数据与单光束 CTLS 以及三个手动秒表（HS）操作员的独立和平均分数。使用组内相关系数和 Bland-Altman 图评估有效性。使用绝对误差四分位数和绝对误差阈值范围内的试验百分比来确定准确性。
与 3D 运动学系统相比，NWHC 系统具有较高的有效性（ICC=0.99，中位数绝对误差（MAR）=2.95%）。对于 5 米飞行试验，NWHC 系统与 CTLS 相比具有极好的有效性和精度（ICC=0.97，MAR<3%）。相比之下，NWHC 系统和 HS 在站立起跑试验中的值仅具有适度的有效性（ICC<0.75）和准确性（MAR>8%）。
NWHC 定时灯光系统价格便宜、便携且可用于评估跑步速度。5 米站立起跑试验中的误差可能是由于商业或基于 NWHC 的定时灯光系统错误地检测到事件。
