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A comparison of a GPS device and a multi-camera video technology during official soccer matches: Agreement between systems

机译：官方足球比赛期间GPS设备和多摄像机视频技术的比较：系统之间的协议

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The aim of this study was to compare the agreement of the movement demands data during a soccer match (total distance, distance per minute, average speed, maximum speed and distance covered in different speed sectors) between an optical tracking system (Mediacoach System) and a GPS device (Wimu Pro). Participants were twenty-six male professional soccer players (age: 21.65 ± 2.03 years; height: 180.00 ± 7.47 cm; weight: 73.81 ± 5.65 kg) from FC Barcelona B, of whom were recorded a total of 759 measurements during 38 official matches in the Spanish second division. The Mediacoach System and the Wimu Pro were compared using the standardized mean bias, standard error of estimate, intraclass correlation coefficients (ICC), coefficient of variation (%), and the regression equation to estimate data for each variable. In terms of agreement between systems, the magnitude of the ICC was almost perfect (> 0.90–1.00) for all variables analyzed. The coefficient of the variations between devices was close to zero (< 5%) for total distance, distance per minute, average speed, maximum speed, and walking and jogging, and between 9% and 15% for running, intense running, and sprinting at low and at high intensities. It can be observed that, compared to Wimu Pro the Mediacoach System slightly overestimated all the variables analyzed except for average speed, maximum speed, and walking variables. In conclusion, both systems can be used, and the information they provide in the analyzed variables can be interchanged, with the benefits implied for practitioners and researchers.
机译：这项研究的目的是比较光学跟踪系统（Mediacoach System）与足球比赛期间运动需求数据的一致性（总距离，每分钟距离，平均速度，最大速度和不同速度扇区所涵盖的距离） GPS设备（Wimu Pro）。参加者是来自巴塞罗那足球俱乐部B的26名男性职业足球运动员（年龄：21.65±2.03岁；身高：180.00±7.47 cm；体重：73.81±5.65 kg），其中在第38场正式比赛中共记录了759次测量西班牙第二师。使用标准平均偏差，估计的标准误差，组内相关系数（ICC），变异系数（％）和回归方程对Mediacoach系统和Wimu Pro进行比较，以估算每个变量的数据。根据系统之间的一致性，对于所有分析的变量，ICC的大小几乎都是完美的（> 0.90–1.00）。对于总距离，每分钟距离，平均速度，最大速度以及步行和慢跑，设备之间的变化系数接近于零（<5％），而对于跑步，激烈的跑步和冲刺，则在9％到15％之间在低强度和高强度下。可以观察到，与Wimu Pro相比，Mediacoach系统稍微高估了除平均速度，最大速度和步行变量之外的所有变量。总之，可以使用这两种系统，并且可以互换它们在所分析变量中提供的信息，这对从业人员和研究人员具有隐含的好处。

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