Abstract Background A Brazilian athlete has proposed setting a new world record for consecutive marathons by running 366 marathons in 366 consecutive days. The impact of such a feat on the cardiovascular system is unknown. Objective To monitor the cardiovascular system to assess the athlete’s cardiovascular adaptations or maladaptations over the period. Methods During the pre-study evaluation, we conducted the pre-participation clinical evaluation (PPE) composed of anamnesis, electrocardiogram, blood test, and functional capacity by maximum cardiopulmonary exercise test (CPET). At […]