Effect of intermittent hypoxic training on 20 km time trial and 30 s anaerobic performance
Effect of intermittent hypoxic training on 20 km time trial and 30 s anaerobic performance
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DOI：
10.1111/j.1600-0838.2009.00946.x
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发表时间：
2010-08-01
影响因子：
4.1
通讯作者：
Anglem, N.
中科院分区：
文献类型：
--
作者：
Hamlin, M. J.;Marshall, H. C.;Anglem, N.
本研究旨在验证“低生活，高训练”的方法是否有益于耐力和/或无氧循环性能。16名训练有素的运动员完成了90分钟的耐力训练（60-70%的心率储备），然后是两次30秒的全力冲刺（温盖特测试），每天，连续10天。9名受试者（间歇低氧训练组）使用FIO2进行训练，使动脉血氧饱和度达到88-82%，而7名受试者（安慰剂组）在呼吸正常气体混合物（FIO2=0.21）的情况下进行训练。在海平面进行了四项性能测试，包括熟悉和基线试验，然后在干预后2天和9天进行重复试验。相对于安慰剂组，30-s Wingate试验期间的平均功率在iht后2天增加了3.0%(95%置信限，CL +/- 3.5%)， 9天增加了1.7%（+/- 3.8%）。其他性能变量（30秒峰值功率、20公里平均功率和20公里耗氧）的变化尚不清楚。在时间试验中，相对于安慰剂组，IHT参与者的血乳酸浓度、呼吸交换比和SpO(2)在干预后2天显著增加。在训练有素的运动员的正常训练计划中加入IHT，可能通过增强糖酵解作用，在30秒短跑中取得了有价值的成绩。
This study aimed to verify whether the "live low, train high" approach is beneficial for endurance and/or anaerobic cycling performance. Sixteen well-trained athletes completed 90 min of endurance training (60-70% of heart rate reserve), followed by two 30-s all-out sprints (Wingate test), daily, for 10 consecutive days. Nine subjects [intermittent hypoxic training (IHT) group] trained with an FIO2 set to produce arterial oxygen saturations of similar to 88-82%, while seven subjects (placebo group) trained while breathing a normal gas mixture (FIO2=0.21). Four performance tests were conducted at sea level including a familiarization and baseline trial, followed by repeat trials at 2 and 9 days post-intervention. Relative to the placebo group, the mean power during the 30-s Wingate test increased by 3.0% (95% confidence limits, CL +/- 3.5%) 2 days, and 1.7% (+/- 3.8%) 9 days post-IHT. Changes in other performance variables (30 s peak power, 20 km mean power and 20 km oxygen cost) were unclear. During the time trial, the IHT participants' blood lactate concentration, respiratory exchange ratio, and SpO(2), relative to the placebo group, was substantially increased at 2 days post-intervention. The addition of IHT to the normal training program of well-trained athletes produced worthwhile gains in 30 s sprint performance possibly through enhanced glycolysis.