摘要
目的:通过研究青藏高原世居藏族青少年运动负荷下心、肺功能,以探讨其高原低氧的适应机制。方法:对居住在青藏高原海拔4200m的世居藏族和同龄移居的汉族青少年静息和运动负荷心、肺功能指标进行测定,指标包括CI(心指数)、VO2(氧耗量)、VCO2(CO2排出量)、DO2(氧供给量)、ERO2(氧摄取率)、SaO2(动脉血氧饱和度)等。结果:两组比较,静息状态下各项指标均无显著差别(P>0.05);但在最大运动负荷状态下,除ERO2外,世居藏族的各项指标均明显大于移居汉族;两组各项指标从静息—运动的变化幅度,世居藏族的CI、VO2、VCO2、DO2明显大于移居汉族(P<0.01,而SO2变化幅度却明显小于移居组(P<0.01)。结论:世居藏族青少年以CI、VO2、DO2为代表的强大的心肺储备功能是他们取得最佳高原适应的基础和保障,这可能是该民族世代生活在高原低氧环境中不断自然选择的结果。
Objective. To study the acclimation mechanism of cardiac and respiratory function in Tibetan adolescents at high altitude. Methods.20 Tibtan and 15 Han adolescents at altitude of 4 200m were investigated by measuring VO2max, CImax, SO2, AT, DO2max during exercise. Results：The VO2max,DO2max, CImax, SO2 and AT in Tibetan group were higher than those of Han group（P〈0. 05～P〈0. 01）. The fluctuate extents of some parameters after exercise were different obviously between the two groups. Conclusions.The higher DO2max may provide the basis of higher work load and VO2max in Tibetan adolescents, because of long tem evolution in hypoxia environment.
出处
《高原医学杂志》
CAS
2007年第3期12-14,共3页
Journal of High Altitude Medicine
关键词
高原
藏族青少年
运动负荷
适应
High altitude
Tibetan
Adolescent
Exercise Acclimatization
