Bell W, Cobner D M
University of Wales Institute-Cardiff, Cyncoed Campus, Cardiff, Wales, UK.
Int J Sports Med. 2007 Feb;28(2):135-9. doi: 10.1055/s-2006-924148. Epub 2006 Nov 28.
The objective of the present investigation was to examine a proposal which stated that individual power values should be aligned according to peak power output (PPO) before calculating the mean value of PPO. This procedure removes the variation in time it takes for individuals to reach PPO. Participants were forty-one University Rugby Union Football players of mean age 21.7 +/- 2.6 years, height 181.4 +/- 6.9 cm and body mass 88.9 +/- 12.7 kg. Data were collected using a friction-belt cycle ergometer (Monark 864, Varberg, Sweden). A significantly larger mean value for PPO was found when results were calculated from time-aligned rather than cross-sectional data (1154 +/- 246 vs. 1121 +/- 254 W, p < 0.0001); the mean difference was approximately 3 %. Additionally, the average profile of the power output curve was more reflective of individual power curves. The negative correlation between PPO and the time taken to reach PPO was - 0.32 (p < 0.05), confirming the view that the earlier the time taken to reach PPO the larger the PPO. It was concluded that the mean value of PPO and the corresponding profile for power output curves are best represented by the analysis of time-aligned rather than cross-sectional data.
本研究的目的是检验一项提议，该提议指出在计算峰值功率输出（PPO）的平均值之前，个体功率值应根据PPO进行校准。此程序消除了个体达到PPO所需时间的差异。参与者为41名大学英式橄榄球联盟足球运动员，平均年龄21.7±2.6岁，身高181.4±6.9厘米，体重88.9±12.7千克。使用摩擦带式自行车测力计（Monark 864，瑞典瓦尔贝里）收集数据。当根据时间校准数据而非横截面数据计算结果时，发现PPO的平均值显著更大（1154±246瓦对1121±254瓦，p<0.0001）；平均差异约为3%。此外，功率输出曲线的平均轮廓更能反映个体功率曲线。PPO与达到PPO所需时间之间的负相关系数为-0.32（p<0.05），证实了达到PPO所需时间越早，PPO越大的观点。得出的结论是，PPO的平均值和功率输出曲线的相应轮廓最好通过对时间校准数据而非横截面数据的分析来表示。
