吸液态氧对高原移居青年通气无氧阈值的影响
高原,,高原；液态氧；力竭运动；氧运输,1对象与方法,2结果,3讨论,【参考文献】
【摘要】 目的 探讨在高原吸入液态氧对移居青年通气无氧阈值的影响。方法 将进驻海拔3700m半年的40名健康青年随机分为两组，每组20人。一组为对照组，受试者用EGM型踏车功量计做坐位踏车运动，初始负荷功率25W，每3min递增50W，以60rpm连续踏车直至力竭。另一组为试验组，在运动前10min开始用面罩吸液态氧，每分钟吸入量为4L，在踏车运动中全程吸氧，踏车方式同对照组。用O2-CO2气体测定仪分析每个负荷最后半分钟的O2和CO2，用心电图机同步记录心率。计算肺通气量(VE)、氧耗量(CO2)、二氧化碳产生量(VCO2)、呼吸商(RQ)及氧通气当量(VE/CO2)。结果 对照组和吸氧组在功率分别达75W和125W时VE、CO2、VCO2出现明显增加，RQ出现“转折点”，VE/CO2由下降转向上升。结论 在高原吸入液态氧能增加人体通气无氧阈，使肺功能得到明显提高。【关键词】 高原；液态氧；力竭运动；氧运输
Effects of liquid oxygen inhalation on anaerobic threshold in high altitude migrants
HU Hua,YAN Xianghua,WANG Wei.The 18th Hospital of PLA,Yecheng 844900,China
【Abstract】 Objective To study the effects of liquid oxygen inhaling on anaerobic threshold in high altitude migrants.Methods 40 young men living at 3700m altitude for 6 months were randomly divided into control group and liquidoxygen group,they were asked to pedal the EGM bicycle ergometer about 60 rpm,and the resistance was progressively increased by 25W per 3 min up to exhaustion,but 20 subjects in liquid-oxygen group had previously inhaled oxygen (4L/min) for 10min until exercise over.Their heart rate (HR),the expiratory content of O2 and CO2 were recorded ......
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