摘要
目的 :观察低氧运动过程中脉搏血氧饱和度 (SpO2 )和血红蛋白 (Hb)的变化规律 ,探讨科学进行高住低训的评价指标。方法 :8名男性受试者每晚于 1 5 . 4 %O2 低氧环境中暴露 1 0小时 ,白天在常氧环境下训练。测定高住低训过程中 ,常氧运动、急性低氧暴露 1 0小时、高住低训第 1、2、3、4周时低氧运动 (1 5 . 4 %O2 ,76 . 5 %VO2 max强度 )中SpO2 及安静时Hb。结果 :(1 )常氧状态下运动时SpO2 下降幅度最小 ,急性低氧暴露时最大。随着受试者对低氧运动的适应 ,SpO2 下降幅度逐渐减小。 (2 )常氧运动中 ,SpO2 在运动开始时下降。随着运动时间的延长SpO2 逐渐回升到运动前水平 ;急性低氧运动时 ,SpO2 一直处于低水平 ,至恢复期 1 0分钟仍未恢复到运动前水平。随着受试者对低氧运动的适应 ,虽然运动中SpO2 下降 ,但运动后 1 0分钟已恢复到安静时水平。 (3)高住低训过程中 ,Hb呈上升趋势 ,第 4周时有所下降 ,且SpO2 与Hb的变化存在较大个体差异。结论 :进行 4周HiLo ,机体逐渐适应了低氧环境 ;个体SpO2 和Hb的变化可能存有一定的关联性。提示可以将SpO2 作为评价低氧适应的生理指标。
Objective To investigate the effects of exercise on oxygen saturation (SpO 2) and the variation of hemoglobin (Hb) during 'living high-training low'(HiLo). Methods Eight male soccer players stayed at night in hypoxic environment(15.4%O 2, 10hr/day), and trained at sea level for 4 weeks. The effects of hypoxic exercise on SpO 2 and Hb before?during and after HiLo were determined. Results (1) SpO 2 declined least significantly in normoxic exercise, and most significant in acute hypoxic exercise. With the adaptation to the hypoxia, the extent of decline in SpO 2 reduced during hypoxic exercise. (2) SpO 2 declined at the beginning during exercising in normoxia and recovered with prolongation of exercise, however, it was not able to recover within 10min after the exercise in acute hypoxia. (3) Hb tended to increase in HiLo, but decreased in the 4th week. There were individual differences in SpO 2 and Hb. Conclusion The subjects adapted to hypoxia gradually during HiLo, and the individual difference in SpO 2 was interrelated with the change in Hb. SpO 2 could be an effective parameter for evaluating the adaptation to hypoxia.
出处
《中国运动医学杂志》
CAS
CSCD
北大核心
2005年第2期203-206,220,共5页
Chinese Journal of Sports Medicine
