Keywords:
摄取高浓度氧气 /
乳酸排除 /
运动表现 /
生理代谢
Abstract: To explore the effects of regular oxygen (21%) and high concentration oxygen (95%) on sprint speed performance and physiological metabolism of sprinters during and after repetitive sprint, studies have been done to provide important reference for scientific sports training monitoring. Ten sprinters from Chengdu competitive sports school were the subjects, which were tested in the balance order for two times (3 days apart) before and after the sprint, 5×50 m for each time. During the interval of 3 minutes and 7 minutes after all the sprint, they were given normal oxygen or high concentration oxygen respectively. At the same time, during and after the sprint, their running speed, lactate, heart rate and heart rate were measured respectively blood oxygen saturation and other parameters. Results show that ① There was no significant difference between the speed performance of the first four sprints under the condition of constant oxygen and high oxygen, but the speed performance under the fifth impact was significantly better than that under the condition of constant oxygen; ② The accumulation of lactate was similar during the sprint under the condition of constant oxygen and high oxygen, and the change curve of lactate was not significantly different. However, in the recovery period of the 7th minute after the sprint, the lactate removal effect was better under the condition of high oxygen; ③ The saturation of blood oxygen in hyperoxia was significantly higher than that in normoxia, but there was no significant difference between heart rate and blood pressure. It is concluded that, although high concentration of oxygen intake during the intermittent rest of repetitive sprint has no effect on the accumulation of lactate during the sprint, it can obtain better performance of exercise speed and is conducive to the elimination of lactate during the recovery period after exercise.