力竭运动后血浆内皮素与心肺功能的变化

采用特异性放射免疫法测定耐力运动员和普通大学生力竭运动后血浆内皮素（ＥＴ）的变化，探索耐力训练对心血管内分泌的影响及其与心肺功能的关系。结果表明：耐力运动员安静时血浆ＥＴ水平明显高于普通大学生，力竭运动后血浆ＥＴ浓度增加，增加幅度耐力运动员明显高于普通大学生，并与心肺功能有一定的关系，提示这可能与ＥＴ的正性肌力和耐力训练后心肺内分泌的适应性改变有关。

Change of Plasma Endothelin and Cardiopulmonary Function after Exhausting Exercise

This study is to explore the changes of plasma endothelia(EF) and cardiopulmonary function in endurance athletes after exhaust- exhausting exercise. The correlation of cardiac endocrine and cardiopulmonary function was also studied after exercise training.The levels of ET in 11 endurance athletes(endurance training group) and 11 college students(control group) were determined by radioimmunoassay under progressively increased exercise load until exhausted. The results showed that the level of plasma ET in endurance training group was obviously higher than that in control group at rest(P< 0.00l) .The concentration of the plasma ET was increased signify- cantle in both groups and the increments of the ET in endurance training group was significantly larger than that in control group after exhausting exercise. The changes of the plasma ET related significantly to cardiopulmonary function. The authors think that those changes might be associated with myocardial positive isotropic action of ET and changes of adaptability of cardiac endocrine after en- durance training.