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目的 :观察吸入液氧对高原人体力竭运动血乳酸及血氨的影响。方法 :对进驻海拔370 0m高原 3个月的 10名健康青年在吸入液氧 (吸氧组 ,4L min)和不吸液氧 (对照组 )的条件下 ,采用功率自行车进行递增负荷运动 ,并在安静时、运动后测定血中血乳酸 (BLA)、血氨 (Ammo)的变化。结果 :与安静时比较 ,对照组和吸氧组运动后BLA、Ammo均增高显著 (P <0 .0 5或P <0 .0 1) ;运动后吸氧组较对照组BLA、Ammo降低显著 (P <0 .0 5或P <0 .0 1)。结论 :吸入液氧能延长供氧时间 ,是提高高原人体运动能力和抗疲劳的理想措施。
Objective: To observe the effects of inhaled liquid oxygen on blood lactic acid and blood ammonia in exhaustive exercise of plateau. Methods: Ten healthy youths who were stationed at an elevation of 370 0 m for 3 months were subjected to incremental load exercise with power bikes under inhalation of liquid oxygen (oxygen inhalation group, 4L min) and no liquid-absorbing oxygen (control group) At rest, the changes of blood lactic acid (BLA) and blood ammonia (Ammo) were measured after exercise. Results: Compared with resting group, BLA and Ammo increased significantly (P <0.05 or P <0.01) after exercise in both control group and oxygen inhalation group. The BLA and Ammo decreased significantly (P <0.05 or P <0.01). Conclusion: Inhaling liquid oxygen can prolong the oxygen supply time. It is an ideal measure to improve the exercise ability and fatigue resistance of the human body at high altitude.