Schairer J R, Briggs D, Kono T, Alam M, Keteyian S, Fedel F, Rosman H, Kuznetsov A A, Stein P D
Henry Ford Heart and Vascular Institute, Detroit, Mich.
Cardiology. 1991;79(4):284-9. doi: 10.1159/000174892.
To determine the response to exercise of the left ventricle of endurance-trained athletes, 6 elite (world class) cyclists were compared to 6 untrained healthy control subjects. In athletes the stroke volume increased with exercise. In untrained volunteers the stroke volume did not change with exercise. This difference of the response of the stroke volume to exercise reflected a difference of the left ventricular end-diastolic volume. In athletes the left ventricular end-diastolic volume tended to increase. In control subjects the end-diastolic volume decreased. In conclusion, athletes increased cardiac output by increasing stroke volume and heart rate, whereas control subjects increased their cardiac output only by increasing their heart rate.
为了确定耐力训练运动员左心室对运动的反应，将6名精英（世界级）自行车运动员与6名未经训练的健康对照者进行了比较。在运动员中，每搏输出量随运动增加。在未经训练的志愿者中，每搏输出量不随运动而变化。每搏输出量对运动反应的这种差异反映了左心室舒张末期容积的差异。在运动员中，左心室舒张末期容积趋于增加。在对照者中，舒张末期容积减少。总之，运动员通过增加每搏输出量和心率来增加心输出量，而对照者仅通过增加心率来增加心输出量。
