| 间歇性低氧刺激对人体最大摄氧量及通气阈值的影响 |
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| 引用本文： | 郭振新,;陈建敏,;肖国强.间歇性低氧刺激对人体最大摄氧量及通气阈值的影响[J].辽宁体育科技,2014(3):39-43. |
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| 作者姓名： | 郭振新 ;陈建敏 ;肖国强 |
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| 作者单位： | [1]罗定职业技术学院,广东罗定510072; [2]华南师范大学体育科学学院,广东广州510006 |
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| 摘 要： | 目的:通过对体育学院大学生进行为期一周的间歇性低氧刺激,观察刺激前后递增负荷运动心率、通气量、摄氧量及定量负荷时血乳酸的变化,探讨间歇性低氧刺激对人体最大摄氧量及通气阈的影响。方法:本实验分两个阶段,每阶段做两次运动负荷。12名体育系男生在实验室常氧条件下在跑台上采用Bruce方法进行递增负荷运动至力竭。间隔3天后进行75%最大摄氧量的定量负荷运动,运动时间为9min,定量负荷后立即进行连续7天,每天1h的12%~10%O2的常压间歇性低氧刺激。低氧刺激完成后第二天再次进行上述两种运动方案。在极限递增负荷至力竭运动前后分别测定心率(HR)、递增负荷至力竭时间(t)、最大摄氧量(VO2max%)、血乳酸(Bla)及定量负荷时Bla等指标。结果:(1)低氧刺激后,递增负荷至力竭运动时HRmax增加(P0.01),VEmax上升(P0.01),呼吸商(R)增加(P0.05),t明显延长(P0.05),Bla明显增加(P0.05),定量负荷运动Bla显著降低(P0.05);(2)间歇性低氧刺激后通气阈时,HR、VE、VO2max%、HRmax%均显著性变化(P0.05),其中VE、VO2max%低氧刺激前后差异非常显著(P0.01)。结论:经过间歇性低氧刺激,受试者在进行递增负荷的力竭性运动时运动时间明显延长,心率在运动后增加,人体通气阈时相对应的心率百分数、最大摄氧量百分比、肺通气量均明显提高,这表明人体有氧耐力和极限负荷运动能力均得到增强。
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| 关 键 词： | 间歇性低氧刺激 最大摄氧量 通气阈 血乳酸 |
About the effect of the intermittent hypoxia stimulus to maxim-um oxygen uptake of human body and ventilatory threshold |
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| Institution: | GUO Zhen-xin , CHEN Jian-min, XIAO Guo-qiang ( 1.Luoding Polytechnic Institute, Luoding 510072, Guangdong, China; 2. Sport Science Institute of South China Normal University, Guangdong 510006, Guangzhou, China) |
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| Abstract: | Through making the students of Physical Education Institute to have intermittent hypoxia stimulus for a week, this article observes the change of increasing heart rate load movement, ventilation volume, oxygen uptake and blood lactic acid in quantitative load before and after hyper-osmotic stimulation,and discusses the effect of the intermittent hypoxia stimulus to maxim-um oxygen uptake of human body and ventilatory threshold. This experiment divides in two stages, each stage does two sports load.12 male students of physical Dept. run by Bruce doning load exercise to exhaustion under normal oxygen in lab.Do 75% maxim-um oxygen uptake load sports interval of 3 days,the time is 9min, and do 12%-10%O2 normal pressures intermittent hypoxia stimulus one hour a day in a seven-day at once after quantitative load.The second day do above two schemes again after hypoxia stimulus, measure the indexes of HR, the time from load exercise to exhaustion（t）, maxim-um oxygen uptake（VO2Mmax%）, Bla and Bla in quantitative load before and after increasing limit load to exhaustion.The result shows that： （1）after hypoxia stimulus, increasing load to exhaustion, HRmax increases（p〈0.01）,VEmax rises（p〈0.05）, respiration quotient（R） increases（p〈0.05）, t extends obviously（p〈0.05）, Bta increases obviously and quantitative load exercise Bla decreases obviously（p〈0.05）. （2） after intermittent hypoxia stimulus ventilatory threshold, HR,VE, VO2Mmax%, HR Mmax% change obviously（p〈0.05）,and the change of VE, VO2Mmax% before and after hypoxia stimulus is obvious（p〈0.01）.It concluded that through the intermittent hypoxia stimulus, the time of students do exercise extends obviously when do limit exercise of increasing load, heart rate increases after exercise, the percent of ventilatory threshold relevant heart rate, the percent of maximum oxygen uptake, pulmonary ventilation increase obviously which indicates the ability of human body aerobic endurance and extreme sports load both enhan |
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| Keywords: | intermittent hypoxia stimulus maximum oxygen uptake ventilatory threshold Bla |
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