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Background: Interpreting the electrocardiography (ECG) recording in young athletes is challenging for the sports doctor. Changes in intraventricular conduction and early ventricular repolarization observed during sports training are not always confirmed in the literature. We test healthy people and look for irregularities in their ECG records. The study aims to draw attention to ST-Elevation (STE) as a variant of the White Athlete's heart norm, with a frequency lower than an inverted T wave (TWI), but also as an effect of early repolarization of the ventricles in young athletes. Is it physiology?

Case report: 14-year-old football player, examined for five years at a sports clinic, cardiology checked every year. Changes like symptomatic adult ECGs with STE and myocardial necrosis were suspected during our observation. Echocardiography, stress test good. A simple response to exercise is to adapt the athlete's heart by ischemia, preconditioning for the heart muscle, and a reversible remodelling that disappears after the sports period. We focus on changes in ECG, which are observed in athletes under 14 years of age, while most of the ECG classifications in an athlete were described above 16 years of age.

Conclusion: the variant observed in our White Athlete is an example of several similar repolarization changes in ECG not yet classified as physiological or resulting from intensive training.