Coleman D A, Wiles J D, Nunn M, Smith M F
Department of Sport Science, Tourism and Leisure, Canterbury Christ Church University College, Kent, UK.
Int J Sports Med. 2005 Jun;26(5):383-7. doi: 10.1055/s-2004-821226.
The study aim was to assess reliability of repeated laboratory sprint tests in well-trained endurance cyclists. Eleven male cyclists (mean +/- standard deviation: 27 +/- 6 yr, 1.79 +/- 0.04 m, 70.1 +/- 3.3 kg) performed a maximal 30-second sprint test on four separate occasions using their own bicycle fitted with an SRM powermeter on a Kingcycle air-braked ergometer. Peak power output (W (peak)), mean power (W (mean)) and an index of fatigue (FI) were calculated. Three minutes post sprint, capillarised blood lactate measurements were taken and analysed. No significant differences (p > 0.05) were found between trials for W (peak), W (mean), FI and blood lactate concentration. Repeatability of W (peak), W (mean), and fatigue index improved across trials 2 and 3 when compared to trials 1 and 2. The highest CV for these variables was recorded between trials 3 and 4. The CV for W (peak) was 4.5 +/- 1.6 %, W (mean) 2.4 +/- 1.2 %, and FI 17.2 +/- 7.1 %. Intraclass reliability coefficients were 0.93 (95 % CI 0.84 - 0.98), 0.94 (95 % CI 0.86 - 0.98) and 0.89 (95 % CI 0.69 - 0.95) respectively. Blood lactate concentration ranged between 5.35 and 14.52 mmol.l(-1), with a mean CV of 12.1 +/- 4.2 %. The CV for trials 2 and 3 revealed the highest CV for blood lactate concentration (15.1 %). The lowest CV for this variable (10.2 %) was recorded between trials 3 and 4. The intraclass reliability coefficient for blood lactate concentration was 0.79 (95 % CI 0.58 - 0.93). The results of this study indicate that there is no improvement in the reliability of sprint test indices when assessing well-trained, experienced cyclists, riding on their own cycle equipment.
本研究旨在评估训练有素的耐力自行车运动员重复进行实验室冲刺测试的可靠性。11名男性自行车运动员（平均±标准差：27±6岁，身高1.79±0.04米，体重70.1±3.3千克）在四台配备SRM功率计的Kingcycle空气制动测力计上，使用自己的自行车，分别进行了4次30秒的最大冲刺测试。计算了峰值功率输出（W（峰值））、平均功率（W（平均））和疲劳指数（FI）。冲刺后3分钟，采集并分析毛细血管血乳酸测量值。在各次测试中，W（峰值）、W（平均）、FI和血乳酸浓度均未发现显著差异（p>0.05）。与第1次和第2次测试相比，第2次和第3次测试中W（峰值）、W（平均）和疲劳指数的重复性有所提高。这些变量在第3次和第4次测试之间的变异系数（CV）最高。W（峰值）的CV为4.5±1.6%，W（平均）为2.4±1.2%，FI为17.2±7.1%。组内相关系数分别为0.93（95%CI 0.84 - 0.98）、0.94（95%CI 0.86 - 0.98）和0.89（95%CI 0.69 - 0.95）。血乳酸浓度在5.35至14.52 mmol.l⁻¹之间，平均CV为12.1±4.2%。第2次和第3次测试的血乳酸浓度CV最高（15.1%）。该变量在第3次和第4次测试之间的CV最低（10.2%）。血乳酸浓度的组内相关系数为0.79（95%CI 0.58 - 0.93）。本研究结果表明，在评估训练有素、经验丰富的自行车运动员使用自己的自行车设备进行冲刺测试时，冲刺测试指标的可靠性没有提高。
