海拔3700m富氧室对人体通气无氧阈值的影响

Effect of oxygen-enriched room on the anaerobic of men at 3700 m altitude

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 study the effect of oxygen-enriched room on the anaerobic threshold (AT) of soldiers at 3 700 m altitude. Methods Ten soldiers stationed at 3 700 altitude served as subjects. The O_2 concentration in the O_2 enriched room was kept around 24%~25%. Incremental exercise 25 w/min tests up to exhaustion were performed before and after staying in the room for 12 h . Ventilation volume(E), oxygen consumption (O_2), CO_2 production (CO_2), respiratory quotient (RQ) and E/O_2 were determined in the course of exercise test. Results The significant increase of E, O_2, CO_2 and the turning point of RQ and E/O_2 appeared at 75 W and 100 W respectively before and after staying in the room. Conclusions The anaerobic threshold and pulmonary function can be elevated through staying in O_2 enriched room. It is suggested that installing of O_2 enriched room is an effective way to improve field work efficiency at 3 700 m.