目的　观察在海拔 370 0 m建立富氧室对人体通气无氧阈值的影响。　方法　 10名受试者在进入富氧室前后分别坐于踏车功量计上 ,以 6 0 r/ min连续踏车 ,0 W为静息时对照值 ,每 3min递增 2 5 W,踏车至力竭时停止 ,用 O2 - CO2 气体测定仪分析每个负荷最后 0 .5 m in的 O2 和 CO2 ,用心电图机同步记录心率。计算肺通气量 (V E)、氧耗量 (V O2 )、二氧化碳产生量 (V CO2 )、呼吸商(RQ )及氧通气当量 (V E/ V O2 )。　结果　富氧室前后在功率分别达 75 W和 10 0 W时 V E、V O2 、V CO2 出现明显增加 ,RQ出现“转折点”,V E/ V O2 由下降转向平稳。　结论　在海拔 370 0 m入富氧室停留后能增加人体通气无氧阈 ,使肺功能得到明显提高。 Objective To observe the effect of oxygen enrichment chamber on the anaerobic threshold of ventilation in 370 0 m altitude. Methods Ten subjects were sitting on the treadmill dynamometer before and after entering the oxygen-enriched chamber. The treadmill was continuously rinsed at 60 r / min, 0 W was the resting control, and the treadmill was increased by 25 W every 3 min. To stop when exhausted, with the O2 - CO2 gas analyzer analysis of each load last 0.5 m in the O2 and CO2, with ECG synchronous heart rate. V˙E, V O2, CO2, respiratory quotient (RQ) and oxygen ventilation equivalence (VE / V O2) were calculated. Results The VE, V O2 and VCO2 significantly increased when the power reached 75 W and 100 W respectively before and after the oxygen-enriched chamber. The “turning point” of RQ appeared and the VE / V O2 turned steadily from descending. Conclusions The anaerobic threshold of ventilation can be increased after staying at the oxygen-enriched room at an altitude of 370 0 m, which improves lung function significantly.