Department of Physical Education and Sports, Faculty of Sport Sciences, University of Granada, Granada, Spain.
Sport and Health University Research Center (iMUDS), University of Granada, Granada, Spain.
Eur J Sport Sci. 2024 Nov;24(11):1597-1603. doi: 10.1002/ejsc.12210. Epub 2024 Oct 14.
This study aimed to compare the accuracy of the power output, measured by a power meter, with respect to the speed, measured by an inertial measurement unit (IMU) and a global navigation satellite system (GNSS) sport watch to determine the critical power (CP) and speed (CS), work over CP (W') and CS (D'), and long-duration performance (i.e., 60 min). Fifteen highly trained athletes randomly performed seven time trials on a 400 m track. The CP/CS and W'/D' were defined through the inverse of time model using the 3, 4, 5, 10, and 20 min trials. The 60 min performance was estimated through the power law model using the 1, 3, and 10 min trials and compared with the actual performance. A lower standard error of the estimate was obtained when using the power meter (CP: 2.7 [2.1-3.3] % and W': 13.8 [10.4-17.3] %) compared to the speed reported by the IMU (CS: 3.4 [2.5-4.3] %) and D': 20.7 [16.6-24.7] %) and GNSS sport watch (CS: 3.4 [2.5-4.3] % and D': 20.6 [16.7-24.7] %). A lower coefficient of variation was also observed for the power meter (4.9 [3.7-6.1] %) Regarding the speed reported by the IMU (10.9 [7.1-14.8] %) and GNSS sport watch (10.9 [7.0-14.7] %) in the 60 min performance estimation, the power meter offered lower errors than the IMU and GNSS sport watch for modelling endurance performance on the track.
本研究旨在比较功率计测量的功率输出准确性与惯性测量单元（IMU）和全球导航卫星系统（GNSS）运动手表测量的速度准确性，以确定临界功率（CP）和速度（CS）、CP 以上的工作（W'）和 CS（D'）以及长时间性能（即 60 分钟）。15 名高度训练的运动员在 400 米赛道上随机进行了 7 次计时赛。CP/CS 和 W'/D' 通过使用 3、4、5、10 和 20 分钟试验的逆时模型定义。60 分钟的性能通过使用 1、3 和 10 分钟试验的幂律模型进行估计，并与实际性能进行比较。使用功率计时，估计值的标准误差较低（CP：2.7 [2.1-3.3]%和 W'：13.8 [10.4-17.3]%），与 IMU 报告的速度（CS：3.4 [2.5-4.3]%和 D'：20.7 [16.6-24.7]%）和 GNSS 运动手表（CS：3.4 [2.5-4.3]%和 D'：20.6 [16.7-24.7]%）相比。功率计的变异系数也较低（4.9 [3.7-6.1]%），而 IMU 和 GNSS 运动手表报告的速度（60 分钟性能估计中的 10.9 [7.1-14.8]%和 10.9 [7.0-14.7]%）在模型跟踪耐力性能方面，功率计的误差低于 IMU 和 GNSS 运动手表。
