全球定位系统跟踪足球运动员跑动距离的准确性实验

An experiment for varying the accuracy of a global positioning system tracking football players' running distances

通过实验测试的方法,对可穿戴全球定位系统(GPS Catapult Optimeye S5)在跟踪足球运动员的跑动距离的信效度进行检验。选取10名大学生足球运动员为实验对象,分别以不同的速度完成了8组60 m直线跑、50 m转弯直线跑和40 m"Z字型"折线跑。GPS跟踪到的每名实验对象每种测试的跑动距离分别为(57.65±2.76)、(46.19±4.09)和(36.50±2.59)m。GPS在跟踪60 m直线跑时,实验对象的测试平均次间CV为0.03(0.01~0.05),平均次间SE为0.61(0.25~1.06),平均Bias为4.9%(1.8%~10.7%),平均SEE为2.4%(1.8%~3.0%);在跟踪50 m转弯直线跑时,平均次间CV为0.06(0.04~0.11),平均次间SE为1.05(0.63~1.76),平均Bias为8.4%(3.1%~17.3%),平均SEE为4.9%(2.2%~10.3%);在40 m"Z字型"折线跑时,平均次间CV为0.06(0.03~0.11),平均次间SE为0.79(0.42~1.51),平均Bias为9.5%(3.8%~14.4%),平均SEE为4.6%(3.0%~5.7%)。实验结果证明GPS Catapult Optimeye S5装备在跟踪足球运动员的跑动距离时具备足够的准确性,跟踪到的运动员移动数据拥有足够的信效度用于科研与教练指导用途。

By means of experimental test method, the authors verified the reliability and validity of Catapult Optimeye S5, a wearable global positioning system, tracking football players’ running distances. The authors selected 10 university stu-dents as experiment objects, who completed 8 rounds of 60m straight line running, 50m turning straight line running and 40m Z-shape fold line running at different speeds. As tracked by the GPS, the experiment objects’ running distances in the tests were （57.65±2.76）m, （46.19±4.09）m and （36.50±2.59）m respectively. When the GPS tracked 60m straight line run-ning, the experiment objects’ average within-player CV was 0.03 （0.01~0.05）, their average within-player SE was 0.61 （between 0.25 and 1.06）, their average Bias was 4.9% （1.8%~10.7%）, their average SEE was 2.4% （between 1.8% and 3.0%）; when the GPS tracked 50m turning straight line running,, the experiment objects’ average within-player CV was 0.06 （0.04 ~0.11）, their average within-player SE was 1.05 （between 0.63 and 1.76）, their average Bias was 8.4% （between 3.1% and 17.3%）, their average SEE was 4.9% （between 2.2 and 10.3%）; when the GPS tracked 40m Z-shape fold line running,, the experiment objects’ average within-player CV was 0.06 （between 0.03 and 0.11）, their average within-player SE was 0.79 （between 0.42 and 1.51）, their average Bias was 9.5% （between 3.8% and 14.4%）, their average SEE was 4.6% （between 3.0% and 5.7%）. The experiment results prove that the GPS Catapult Optimeye S5 equipment is provided with adequate accuracy when it tracks football players’ running distances, and the players’ moving data it tracks have adequate reliability and validity for the purposes of scientific research and coach guidance.