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目的：观察吸氧对大强度运动后自由基代谢、红细胞抗氧化系统的影响。２０名男子受试者参加本实验。结果：（１）运动后即刻，７０％Ｏ２吸氧组与不吸氧组的血清、红细胞中的ＭＤＡ、血清中的ＳＯＤ和ＧＳＨ显著高于安静水平。（２）运动结束后３０分钟，７０％Ｏ２吸氧组的红细胞中的ＭＤＡ显著低于不吸氧组。（３）运动结束后３０分钟，７０％Ｏ２吸氧组的血清ＳＯＤ和血液、血清中的ＧＳＨ显著高于不吸氧组。结果表明，运动后恢复期吸７０％Ｏ２对运动造成的自由基损伤有明显的抑制作用，可加速运动后体内代谢产物自由基的清除及加快疲劳的消除。
Objective: To observe the effects of oxygen on free radical metabolism and erythrocyte antioxidant system after intensive exercise. Twenty men participated in the experiment. Results: (1) Immediately after exercise, the levels of serum MDA, erythrocyte SOD and GSH in serum of 70% Oxygen-inhaled and non-oxygenated groups were significantly higher than that of quiet. (2) 30 minutes after exercise, MDA in erythrocytes in 70% O2 inhalation group was significantly lower than that in non-oxygen inhalation group. (3) 30 minutes after exercise, serum SOD and blood and serum GSH in 70% O2 inhalation group were significantly higher than those in non-oxygen inhalation group. The results showed that 70% O2 inhalation during post-exercise recovery significantly inhibited free radical damage induced by exercise, accelerated the elimination of free radical metabolites and accelerated the elimination of fatigue.