Atrial fibrillation is the most common sustained cardiac arrhythmia and is associated with significant morbidity and mortality. Coronary artery disease frequently coexists with AF, and management of these associated conditions can be challenging. Endurance veteran athletes are a population at high risk to have episodes of paroxysmal atrial fibrillation. Herewith the author describes an original case of induced atrial fibrillation and myocardial ischemia during an Ex-ECG stress test in a veteran amateur runner.