X射线和尸体解剖的研究结果都曾表明,运动员的心脏比坐位工作的对照组更大,后来用超声心动图进行的研究也证实了这一点。此外,还发现不同项目的运动员之间,心脏大小存在着显著的差异。耐力性运动员具有较大的左心室内径和正常的或稍厚的心室壁,而力量性运动员具有正常的左心室内经和较厚的室壁。短跑运动员的左室壁厚度和 Results from X-ray and autopsy studies have shown that athletes have a greater heart than sitters, a study later confirmed by echocardiography. In addition, there were also significant differences in cardiac size between athletes of different sports. Endurance athletes have a larger left ventricular internal diameter and a normal or thicker ventricular wall, whereas a powered athlete has a normal left ventricular endocardium and a thicker ventricular wall. Sprinter left ventricular wall thickness and