Metabolic and Body Composition Laboratory, Department of Health and Exercise Science, University of Oklahoma, 1401 Asp Ave HHC 104, Norman, OK 73019, USA.
Eur J Appl Physiol. 2012 Apr;112(4):1197-205. doi: 10.1007/s00421-011-2076-z. Epub 2011 Jul 17.
The purpose of this study was to examine the reliability of the intermittent critical velocity (ICV) test and assess critical rest interval (CRI) during repeated-sprint exercise. The ICV test is used to examine the linear relationship between total distance and time-to-exhaustion during interval exercise, yielding a repeatable, moderate-intensity parameter (ICV), a high-intensity exhaustive parameter (W'), and CRI. CRI is the theoretical rest period needed to complete a series of repeated bouts of exercise without fatigue. Twenty-four healthy college-aged men (mean ± SD; age 22.7 ± 2.9 years; weight 85.8 ± 15.3 kg; VO(2max) 50.7 ± 8.8 ml/kg/min) and women (mean ± SD; age 21.4 ± 2.3 years; weight 58.9 ± 5.2 kg; VO(2max) 46.4 ± 4.4 ml/kg/min) participants completed two ICV tests (T1 and T2), using 10 s repeated sprints to exhaustion during separate sessions of treadmill running. Linear regression was used to determine ICV and W', while CRI was calculated using the relationship between the number of intervals completed and a variant of ICV. Intraclass correlation coefficients (ICCs) for ICV, W', and CRI were 0.89 (T1 4.42 ± 0.55 m/s; T2 4.34 ± 0.67 m/s), 0.80 (T1 125.6 ± 62.7 m; T2 144.6 ± 65.4 m), and 0.59 (T1 23.9 ± 2.0 s; T2 24.5 ± 2.6 s), respectively. These moderate to high ICC values indicate reliable measurements between ICV trials. Additionally, the evaluation of CRI demonstrated the attainment of a steady-state heart rate (94% of maximum) during a separate session of repeated supramaximal treadmill sprints. The ICV test during treadmill running provides reliable ICV and W' measures, as well as an estimated recovery time via CRI for men and women.
本研究旨在检验间歇临界速度（ICV）测试的可靠性，并评估重复冲刺运动中的临界休息间隔（CRI）。ICV 测试用于检查间歇运动中总距离和力竭时间之间的线性关系，产生可重复的中等强度参数（ICV）、高强度耗尽参数（W'）和 CRI。CRI 是完成一系列无疲劳重复冲刺所需的理论休息时间。24 名健康的大学生（平均 ± 标准差；年龄 22.7 ± 2.9 岁；体重 85.8 ± 15.3kg；最大摄氧量 50.7 ± 8.8ml/kg/min）和女性（平均 ± 标准差；年龄 21.4 ± 2.3 岁；体重 58.9 ± 5.2kg；最大摄氧量 46.4 ± 4.4ml/kg/min）参与者在跑步机上进行了两次 ICV 测试（T1 和 T2），使用 10 秒重复冲刺至力竭。线性回归用于确定 ICV 和 W'，而 CRI 则使用完成的间隔数与 ICV 的变体之间的关系来计算。ICV、W'和 CRI 的组内相关系数（ICC）分别为 0.89（T1 为 4.42 ± 0.55m/s；T2 为 4.34 ± 0.67m/s）、0.80（T1 为 125.6 ± 62.7m；T2 为 144.6 ± 65.4m）和 0.59（T1 为 23.9 ± 2.0s；T2 为 24.5 ± 2.6s）。这些从中等到高的 ICC 值表明 ICV 试验之间的测量具有可靠性。此外，CRI 的评估表明，在单独的重复超最大跑步机冲刺训练中，心率达到了稳定状态（最大心率的 94%）。跑步机上的 ICV 测试为男性和女性提供了可靠的 ICV 和 W'测量值，以及通过 CRI 估计的恢复时间。
