Phillips Kathryn E, Hopkins Will G
Int J Sports Physiol Perform. 2017 May;12(5):628-633. doi: 10.1123/ijspp.2016-0204. Epub 2016 Sep 15.
To explore the extent to which factors that determine performance transfer within and between time-trial and mass-start events in the track-cycling Omnium.
Official finish rank in the 3 time-trial events, in the 3 mass-start events, and in the competition overall were collated in 20 international Omnium competitions between 2010 and 2014 for 196 male and 140 female cyclists. Linear mixed modeling of the log-transformed finish time for the time-trial events and of log-transformed finish rank for all events and final rank provided estimates of within-athlete race-to-race changes in performance and average betweenathletes differences across a season. These estimates were converted to various correlations representing relationships within and between the various events and final rank.
Intraclass correlation coefficients, representing race-to-race reproducibility of performance, were similar whether derived from finish rank or finish time for the time-trial events. Log-transformed finish ranks are therefore a suitable measure to assess and compare performance in time-trial and mass-start events. Omnium cyclists were more predictable in their performances from race to race in the timed events, whereas reduced predictability was observed in mass-start events. Interevent correlations indicated stronger links in performance between the timed disciplines, whereas performance in any of the mass-start events had only a slight positive relationship with performance in the other massstart events and little or no relationship with the timed events.
Further investigation is warranted to determine whether factors related to performance in mass-start events can be identified to improve reproducibility or whether variability in performance results from random chance.
探讨在场地自行车全能赛中，决定个人计时赛和集体出发赛内部及之间成绩转移的因素的影响程度。
整理了2010年至2014年间20场国际全能赛中196名男性和140名女性自行车运动员在3场个人计时赛、3场集体出发赛以及整个比赛中的官方完赛排名。对个人计时赛的对数转换后的完赛时间以及所有赛事和最终排名的对数转换后的完赛排名进行线性混合建模，以估计运动员在不同比赛之间的成绩变化以及一个赛季中运动员之间的平均差异。这些估计值被转换为各种相关性，以表示不同赛事之间以及与最终排名之间的关系。
代表成绩逐场再现性的组内相关系数，无论是从个人计时赛的完赛排名还是完赛时间得出，都相似。因此，对数转换后的完赛排名是评估和比较个人计时赛和集体出发赛成绩的合适指标。在计时赛中，全能赛自行车运动员的成绩在不同比赛之间更具可预测性，而在集体出发赛中可预测性降低。赛事间的相关性表明，计时项目之间的成绩联系更强，而任何一场集体出发赛的成绩与其他集体出发赛的成绩之间只有轻微的正相关，与计时赛的成绩几乎没有关系。
有必要进一步研究，以确定是否可以识别与集体出发赛成绩相关的因素，以提高再现性，或者成绩的变化是否是由随机因素导致的。
