中文摘要：

目的：探讨α-辅肌动蛋白-3（ACTN3）基因多态性与有氧耐力的关联性。方法：采用聚合酶链反应-限制性片段长度多态性分析（PCR-RFLP）对123名中国北方汉族优秀长跑运动员（运动员组）与206名中国北方汉族普通大学生（对照组）的ACTN3基因的R577X单核苷酸多态位点进行多态分析和比较。结果：R577X位点的分布频率在运动员组与对照组之间无显著性差异。结论：中国北方汉族人群ACTN3基因R577X位点与有氧耐力不相关。

英文摘要：

To explore the relationship between α-actinins-3 （ACTN3） genotype and aerobic endurance in northern Han nationality Chinese, the authors compared ACTN3 R577X genotype of 123 northern Han elite long-distance running athletes with that of 206 normal northern university students through polymerase chain reaction and restriction fragment-length polymorphism （PCR-RFLP）. It was found that there was no significant difference in the distribution of R577X location between northern elite long-distance running athletes and controls. It was concluded that R577X location of Han people was not correlated with aerobic endurance capacity.