Snoeckx L H, Abeling H F, Lambregts J A, Schmitz J J, Verstappen F T, Reneman R S
Eur J Appl Physiol Occup Physiol. 1983;52(1):20-8. doi: 10.1007/BF00429020.
The cardiac dimensions of male long-distance runners (LDR) and cycle racers (CR) were determined echocardiographically during four different training seasons, i.e., a preparation, a competitive, a slowing-down and a resting season, and were compared with those of control subjects (CS). Left ventricular hypertrophy (LVH) was also assessed from the electrocardiogram. The maximal aerobic performance was determined on a bicycle ergometer. In the athletes, left ventricular mass was significantly greater in all seasons than the values in the CS. This difference resulted from a thicker interventricular septum and left ventricular posterior wall as well as a larger left ventricular internal diameter. The existence of LVH was confirmed by the electrocardiographic findings. No differences were observed between the four different training seasons, despite considerable changes in the training program for weeks to months. The maximal aerobic performance test in LDR showed a significantly higher workload during the competitive than during the preparation season. The CR reached significantly lower values during the resting season than during the other seasons. The results indicate that the possible adaptation of the cardiac dimensions to variations in the heaviness of the training program is relatively slow.
在四个不同的训练季节，即准备期、比赛期、减量期和休息期，通过超声心动图测定男性长跑运动员（LDR）和自行车赛车手（CR）的心脏尺寸，并与对照组受试者（CS）的心脏尺寸进行比较。还通过心电图评估左心室肥厚（LVH）。在自行车测力计上测定最大有氧能力。在运动员中，所有季节的左心室质量均显著高于CS组的值。这种差异是由于室间隔和左心室后壁增厚以及左心室内径增大所致。心电图结果证实了LVH的存在。尽管训练计划在数周至数月内有相当大的变化，但在四个不同的训练季节之间未观察到差异。LDR的最大有氧能力测试显示，比赛期的工作量显著高于准备期。CR在休息期的值显著低于其他季节。结果表明，心脏尺寸对训练计划强度变化的可能适应性相对较慢。
