Performance Department, Paris Saint-Germain FC, Saint-Germain-en-Laye,France.
French Institute of Sport (INSEP), Laboratory of Sport, Expertise and Performance (EA 7370), Paris,France.
Int J Sports Physiol Perform. 2022 Jul 11;17(10):1527-1531. doi: 10.1123/ijspp.2021-0339. Print 2022 Oct 1.
The aims of this study were to (1) assess the concurrent validity of global positioning systems (GPSs) against a radar device to measure sprinting force-velocity (F-v) profiles and (2) evaluate the interunit reliability of 10-Hz GPS devices (Vector S7, Catapult Innovations).
Sixteen male elite U18 rugby union players (178.3 [7.6] cm; 78.3 [13.2] kg) participated. Two 50-m sprints interspersed with at least 5 minutes of recovery were completed to obtain input (maximal sprint speed and acceleration time constant τ) and output (theoretical maximal horizontal force, sprinting speed, and horizontal power) F-v profile variables. Sprint running speed was concurrently measured with a radar and 2 GPS units placed on the upper back of each player. Concurrent validity and interunit reliability analyses were performed.
Moderate to nearly perfect correlations were observed between radar and GPS-derived F-v variables, with small to large typical errors. Trivial to small coefficients of variation were found regarding the GPS interunit reliability.
The GPS devices tested in this study represent a valid and reliable alternative to a radar device when assessing sprint acceleration F-v profiles in team-sport players.
本研究旨在（1）评估全球定位系统（GPS）与雷达设备测量冲刺力-速度（F-v）曲线的同步有效性，（2）评估 10-Hz GPS 设备（Vector S7，Catapult Innovations）的单元间可靠性。
16 名男性精英 U18 橄榄球联盟运动员（178.3[7.6]厘米；78.3[13.2]千克）参加了测试。进行了两次 50 米冲刺，中间至少休息 5 分钟，以获得输入（最大冲刺速度和加速度时间常数τ）和输出（理论最大水平力、冲刺速度和水平功率）F-v 曲线变量。使用雷达和两个 GPS 单元测量冲刺跑步速度，每个单元放置在每个运动员的上背部。进行了同步有效性和单元间可靠性分析。
雷达和 GPS 衍生的 F-v 变量之间存在中度到几乎完美的相关性，具有小到大的典型误差。关于 GPS 单元间可靠性，发现变异系数为微不足道到小。
本研究中测试的 GPS 设备在评估团队运动运动员冲刺加速 F-v 曲线时，是一种可靠且有效的雷达设备替代方案。
