We report that anaerobic thresholds of distance runners are related mostly to training volume and not to left ventricular (LV) morphofunction. Significant correlation between LV diastolic function at rest and anaerobic thresholds was not detected. However, we found an inverse correlation between LV mass (wall thickness too) and resting as well as exercise heart rate. No significant correlation seems to exist between distance runners' LV size and anaerobic thresholds despite of positive association between training volume and degree of LV concentric hypertrophy as well as anaerobic thresholds. In conclusion, the anaerobic thresholds are related mostly to endurance training volume but not echocardiographic parameters.