Intense physical activity creates hemodynamic stress to which the heart and the vascular system responds acutely and chronically adapts. Long-term adaptation leads to the image of the so-called athlete's heart.
The athlete's heart is characterized by the harmonic/proportional dilation of all heart chambers and ventricle wall hypertrophy. These changes are also reflected in 12-lead ECG, which reflects both anatomical changes and vagotonia.
One of the characteristics of the athlete's heart is its dynamic nature during sports season and their regression if the intensity of training is significantly reduced.