A 20-year-old male athlete (runner) with palpitation. Cine-CMR images show, in short-axis (A) and in four-chamber (B) planes, LV symmetrical eccentrical hypertrophy (13 mm) (line), bi-ventricular dilations with LV maximum diameter of 60 mm (dashed double-headed arrows) and RV maximum diameter of 56 mm (full double-headed arrows) and mid-apical bi-ventricular hyper-trabeculation. Delay-CMR contrast images demonstrate, in short-axis (C) plane, a linear LGE in the mesocardial layer at the postero-septal junction (arrow), instead, no LGE areas are visible in four-chamber plane (D). The final diagnosis was physiological cardiac modifications in AH.