>Objective: To investigate the relationship between several physiological variables that can be easily obtained during cycle ergometer gradual testing (for example, peak power output (Wpeak), VO2max, or ventilatory threshold (VT)) and actual (>50 km) time trials (TT) time performance during the Tour de France. >Methods: We collected data in professional cyclists from the first TT of the 1998 Tour de France (TT1, 58 km distance; n = 6 cyclists) and the first (TT2, 56.5 km; n = 5) and second TT of the 1999 Tour de France (TT3, 57 km; n = 5). >Results: A negative relationship was found between power output (W) at VT (VTWatt) and TT final time (s) in TT1 (r = –0.864; p = 0.026; standard error of estimate (SEE) of 73 s; and 95% confidence limits (95% CL) –0.98; –0.18), TT2 (r = –0.77; p = 0.27; SEE of 139 s; and 95% CL –0.98; 0.35), and TT3 (r = –0.923; p = 0.025; SEE of 94 s; and 95% CL –1.00; –0.22). >Conclusions: Actual performance in long TT during the Tour de France (>50 km distance, performed after at least 1–2 weeks of continuous competition), in which some cumulative fatigue inevitably occurs, is related, at least in part, to the power output that elicits the VT. No other routine physiological variable (for example, VO2max or Wpeak) is related to performance in this type of event.
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机译：>目的：研究在循环测功机逐步测试过程中可以轻松获得的几个生理变量（例如，峰值功率输出（Wpeak），VO2max或通气阈值（VT））与实际之间的关系。环法自行车赛期间> 50 km）的计时赛（TT）时间表现。 >方法：我们从1998年环法自行车赛的第一次TT（TT1，58公里； n = 6个自行车手）和第一次（TT2，56.5 km； n = 5）收集专业自行车手的数据以及1999年环法自行车赛的第二次TT（TT3，57公里； n = 5）。 >结果：在VT（VTWatt）处的功率输出（W）与TT1中的TT最终时间（s）之间存在负相关关系（r = –0.864； p = 0.026；估计的标准误差（SEE） ）的时间为73 s； 95％的置信度限制（95％CL）–0.98; –0.18），TT2（r = –0.77; p = 0.27; SEE为139 s; 95％CL –0.98; 0.35）和TT3 （r = –0.923； p = 0.025； SEE为94 s； 95％CL –1.00； –0.22）。 >结论：在环法自行车赛（> 50 km的距离，连续比赛至少1-2周后进行）中，长时间TT的实际表现不可避免地会产生一些累积疲劳。至少部分是引起VT的功率输出。没有其他常规的生理变量（例如，VO2max或Wpeak）与此类事件的表现有关。
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