Laursen P B, Shing C M, Jenkins D G
Human Performance Laboratory, School of Human Movement Studies, The University of Queensland, Brisbane, Australia.
Int J Sports Med. 2003 Oct;24(7):481-5. doi: 10.1055/s-2003-42012.
The purpose of the present study was to examine the reproducibility of laboratory-based 40-km cycle time-trial performance on a stationary wind-trainer. Each week, for three consecutive weeks, and on different days, forty-three highly trained male cyclists (x +/- SD; age = 25 +/- 6 y; mass = 75 +/- 7 kg; peak oxygen uptake [VO (2)peak] = 64.8 +/- 5.2 ml x kg (-1) x min (-1)) performed: 1) a VO (2)peak test, and 2) a 40-km time-trial on their own racing bicycle mounted to a stationary wind-trainer (Cateye - Cyclosimulator). Data from all tests were compared using a one-way analysis of variance. Performance on the second and third 40-km time-trials were highly related (r = 0.96; p < 0.001), not significantly different (57 : 21 +/- 2 : 57 vs. 57 : 12 +/- 3 : 14 min:s), and displayed a low coefficient of variation (CV) = 0.9 +/- 0.7 %. Although the first 40-km time-trial (58 : 43 +/- 3 : 17 min:s) was not significantly different from the second and third tests (p = 0.06), inclusion of the first test in the assessment of reliability increased within-subject CV to 3.0 +/- 2.9 %. 40-km time-trial speed (km x h (-1)) was significantly (p < 0.001) related to peak power output (W; r = 0.75), VO (2)peak (l x min (-1); r = 0.53), and the second ventilatory turnpoint (l x min (-1); r = 0.68) measured during the progressive exercise tests. These data demonstrate that the assessment of 40-km cycle time-trial performance in well-trained endurance cyclists on a stationary wind-trainer is reproducible, provided the athletes perform a familiarization trial.
本研究的目的是检验在固定的风阻训练器上进行基于实验室的40公里自行车计时赛成绩的可重复性。连续三周，每周在不同日期，43名训练有素的男性自行车运动员（x±标准差；年龄=25±6岁；体重=75±7公斤；峰值摄氧量[VO₂峰值]=64.8±5.2毫升·千克⁻¹·分钟⁻¹）进行：1）一次VO₂峰值测试，以及2）在安装于固定风阻训练器（猫眼-自行车模拟器）上的自己的比赛自行车上进行一次40公里计时赛。使用单因素方差分析对所有测试数据进行比较。第二次和第三次40公里计时赛成绩高度相关（r=0.96；p<0.001），无显著差异（57:21±2:57对57:12±3:14分钟:秒），且变异系数较低（CV）=0.9±0.7%。尽管第一次40公里计时赛（58:43±3:17分钟:秒）与第二次和第三次测试无显著差异（p=0.06），但在可靠性评估中纳入第一次测试会使受试者内CV增加到3.0±2.9%。40公里计时赛速度（公里·小时⁻¹）与渐进性运动测试期间测得的峰值功率输出（瓦特；r=0.75）、VO₂峰值（升·分钟⁻¹；r=0.53）以及第二个通气拐点（升·分钟⁻¹；r=0.68）显著相关（p<0.001）。这些数据表明，在固定风阻训练器上对训练有素的耐力自行车运动员进行40公里自行车计时赛成绩的评估是可重复的，前提是运动员进行一次适应性试验。
