【摘要】 选取参加全国大学生运动会赛前集训的长跑运动员 1 0名 (男、女各 5名 ) ,于集训初期进行了 30 0 0米成绩测试 ,经过 2个月课余训练 ,进行了第二次 5 0 0 0米测试 ,于长跑测试前后分别采取血样 ,测定其血清醛固酮及Na+ 、K+ 、Cl- 、Ca2 + 、Mg2 + 等离子浓度。结果表明 ,两次耐力运动后 ,醛固酮浓度均明显升高 (P <0 0 5 ) ,且Na+ 、Cl- 浓度也明显上升 (P <0 0 5 ) ;但其它离子在两种不同距离跑后变化不太一致 ,30 0 0米跑后Ca2 + 明显上升 ,K+ 无明显变化 ;而 5 0 0 0米跑后 ,K+ 明显上升 ,Ca2 + 无明显变化。两次运动后Mg2 + 浓度均无明显变化。由此可见 ,耐力运动后机体为防止离子和水分过多丢失 ,主动加强盐皮质激素醛固酮的分泌 ,从而加强肾小管对Na+ 、Cl- 等的重吸收 ,起到保钠保水的作用 ,文中还讨论了肾素———血管紧张素—醛固酮系统对水盐代谢的调节机制。更多还原

【Abstract】 10 endurance athletes were selected and trained for the National Sports Meet of Uniersity Student.The 3000 meters event performance were measured at the start of training,then 5000m event performance were measured after the training of two months.The blood amples before and after endurance exercise were collected and measured.The indexes selected were serum aldosteron and N a +?K +?Cl -?C a 2+ ?M g 2+ concetration.The results showed that the serum aldosteron level increased distinguishly(P<0.05)after two endurance exercises,and the N a +?K +?Cl -levels also(P<0.05).But the C a 2+ level increased after 3000m event,and the k + level increased only after 5000m event.The M g 2+ concentration didn’t change distinguishly.It indicate that more aldosteron was secreted and promoted the reabsorption of N a +?Cl - and water by kidney tubule to provent the exess loses of water and ion in endurance exercise.The paper also discussed the regulative function of renin -angiontesin-aldosteron system(RAAS).更多还原