Centre for Sports Studies, University of Kent, Chatham Maritime , Chatham, Kent, UK.
J Sports Sci Med. 2009 Dec 1;8(4):528-32. eCollection 2009.
The aim of the study was to assess the reliability of sprint performance in both field and laboratory conditions. Twenty-one male (mean ± s: 19 ± 1 years, 1.79 ± 0.07 m, 77.6 ± 7.1 kg) and seventeen female team sport players (mean ± s: 21 ± 4 years, 1.68 ± 0. 07 m, 62.7 ± 4.7 kg) performed a maximal 20-metre sprint running test on eight separate occasions. Four trials were conducted on a non-motorised treadmill in the laboratory; the other four were conducted outdoors on a hard-court training surface with time recorded by single-beam photocells. Trials were conducted in random order with no familiarisation prior to testing. There was a significant difference between times recorded during outdoor field trials (OFT) and indoor laboratory trials (ILT) using a non-motorised treadmill (3.47 ± 0.53 vs. 6.06 ±1.17s; p < 0.001). The coefficient of variation (CV) for time was 2.55-4.22% for OFT and 5.1-7.2% for ILT. During ILT peak force (420.9 ± 87.7N), mean force (147.2 ± 24.7N), peak power (1376.8 ± 451.9W) and mean power (514.8 ± 164.4W), and were measured. The CV for all ILT variables was highest during trial 1-2 comparison. The CV (95% confidence interval) for the trial 3-4 comparison yielded: 9.4% (7.7-12. 1%), 7.9% (6.4-10.2%), 10.1% (8.2-13.1%) and 6.2% (5.1-8.0%) for PF, MF, PP and MP and respectively. The results indicate that reliable data can be derived for single maximal sprint measures, using fixed distance protocols. However, significant differences in time/speed over 20-m exist between field and laboratory conditions. This is primarily due to the frictional resistance in the non- motorised treadmill. Measures of force and power during ILT require at least 3 familiarisations to reduce variability in test scores. Key pointsReliable data can be derived from single maximal sprint measures in both indoor and outdoor environments using fixed distance protocols.There may be significant time differences to complete fixed distance trials between the two environments.Measures of mean force, peak force and peak power during indoor trials may require multiple trials to reduce variability in test scores.
本研究旨在评估在现场和实验室条件下冲刺表现的可靠性。21 名男性（平均± s：19 ± 1 岁，1.79 ± 0.07 m，77.6 ± 7.1 kg）和 17 名女性团队运动运动员（平均± s：21 ± 4 岁，1.68 ± 0.07 m，62.7 ± 4.7 kg）在八个不同场合进行了最大 20 米冲刺跑测试。四次试验在实验室的非机动跑步机上进行；另外四次在硬地训练表面上进行，使用单光束光电管记录时间。试验以随机顺序进行，在测试前没有熟悉阶段。在使用非机动跑步机时，户外实地试验（OFT）和室内实验室试验（ILT）记录的时间有显著差异（3.47 ± 0.53 与 6.06 ±1.17s；p < 0.001）。OFT 的时间变异系数（CV）为 2.55-4.22%，ILT 的时间变异系数为 5.1-7.2%。在 ILT 期间，测量了峰值力（420.9 ± 87.7N）、平均力（147.2 ± 24.7N）、峰值功率（1376.8 ± 451.9W）和平均功率（514.8 ± 164.4W）。所有 ILT 变量的 CV 在试验 1-2 比较中最高。试验 3-4 比较的 CV（95%置信区间）分别为：9.4%（7.7-12.1%）、7.9%（6.4-10.2%）、10.1%（8.2-13.1%）和 6.2%（5.1-8.0%），用于 PF、MF、PP 和 MP。结果表明，使用固定距离方案，可以从单次最大冲刺测量中得出可靠的数据。然而，在现场和实验室条件之间，20 米的时间/速度存在显著差异。这主要是由于非机动跑步机的摩擦阻力造成的。在 ILT 期间的力和功率测量需要至少 3 次熟悉化，以减少测试分数的变异性。关键点可以使用固定距离方案从室内和室外环境中的单次最大冲刺测量中得出可靠的数据。在两种环境中完成固定距离试验可能存在显著的时间差异。在室内试验中，平均力、峰值力和峰值功率的测量可能需要多次试验才能减少测试分数的变异性。
