吸液态氧对高原移居青年心功能指数的影响

目的　探讨在高原吸入液态氧对人体做功时心功能指数的影响。方法　将进驻海拔 3 70 0m半年的 40名健康青年随机分为两组 ,每组 2 0人。一组为对照组 ,受试者用EGM踏车功量计做坐位踏车运动。初始负荷功率 2 5W ,每 3min递增 5 0W ,以 60转 /min连续踏车直至力竭。另一组为实验组 ,在运动前 10min开始面罩吸液态氧 ,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。按公式计算每位受试者的心功能指数。结果　吸氧组心功能指数为 48 67± 3 2 9,对照组心功能指数为 44 86± 4 2 5 ,差异非常显著 (P <0 .0 1)。结论　吸液态氧能明显提高高原移居青年的心功能和提高做功效率

Effect of Bathing Liquid Oxygen on Heart Functional Index of Young Immigrants at High Altitude

Objective To explore effect of bathing liquid oxygen on heart finctional index of young immigrants at high altitude after exercise. Methods Forty healthy young immigrants at 3 700 m altitude for 6 months served as subjects.They were randomly divided into two groups,compare group and experiment group.The men of compare group constantly pedaled the EGM efficiency bicycle (initial load 25W,increase 50W per 3 min to exhaustion at 60ppm/min). The men of experiment group bathed liquid oxygen (using face guard,4L/min) /for 10 min before exercise,bathing liquid oxygen during the exercise,the way of pedaling was same to the compare group.Using formulation calculated each man's heart functional index. Results Heart functional index of experiment group was 48.67±3.29,the compare group was 44.86±4.25,they were significantly difference ( P <0.01 ).Conclusion Bathing liquid oxygen significantly advanes heart function and work efficiency of young immigrants at high altitude after exercise.