Coleman D A, Wiles J D, Davison R C R, Smith M F, Swaine I L
Department of Sport Science, Tourism and Leisure, Canterbury Christ Church University, Canterbury, Kent, United Kingdom.
Int J Sports Med. 2007 Jun;28(6):525-30. doi: 10.1055/s-2006-955888. Epub 2007 May 11.
The study aim was to consider the use of a motorised treadmill as a cycling ergometry system by assessing predicted and recorded power output values during treadmill cycling. Fourteen male cyclists completed repeated cycling trials on a motorised treadmill whilst riding their own bicycle fitted with a mobile ergometer. The speed, gradient and loading via an external pulley system were recorded during 20-s constant speed trials and used to estimate power output with an assumption about the contribution of rolling resistance. These values were then compared with mobile ergometer measurements. To assess the reliability of measured power output values, four repeated trials were conducted on each cyclist. During level cycling, the recorded power output was 257.2 +/- 99.3 W compared to the predicted power output of 258.2 +/- 99.9 W (p > 0.05). For graded cycling, there was no significant difference between measured and predicted power output, 268.8 +/- 109.8 W vs. 270.1 +/- 111.7 W, p > 0.05, SEE 1.2 %. The coefficient of variation for mobile ergometer power output measurements during repeated trials ranged from 1.5 % (95 % CI 1.2 - 2.0 %) to 1.8 % (95 % CI 1.5 - 2.4 %). These results indicate that treadmill cycling can be used as an ergometry system to assess power output in cyclists with acceptable accuracy.
本研究的目的是通过评估跑步机骑行过程中的预测功率输出值和记录功率输出值，来探讨将电动跑步机用作自行车测功系统的可行性。14名男性自行车运动员骑着自己装有移动测力计的自行车，在电动跑步机上完成了多次骑行测试。在20秒的恒速测试中记录速度、坡度和通过外部滑轮系统的负荷，并在假设滚动阻力贡献的情况下用于估计功率输出。然后将这些值与移动测力计的测量值进行比较。为了评估测量功率输出值的可靠性，对每位自行车运动员进行了4次重复测试。在平路骑行时，记录的功率输出为257.2 +/- 99.3瓦，而预测的功率输出为258.2 +/- 99.9瓦（p > 0.05）。对于坡度骑行，测量功率输出与预测功率输出之间没有显著差异，分别为268.8 +/- 109.8瓦和270.1 +/- 111.7瓦，p > 0.05，标准误差为1.2%。重复测试期间移动测力计功率输出测量的变异系数范围为1.5%（95%置信区间1.2 - 2.0%）至1.8%（95%置信区间1.5 - 2.4%）。这些结果表明，跑步机骑行可作为一种测功系统，以可接受的精度评估自行车运动员的功率输出。
