True or False: Atrial fibrillation is common in long distance runners?

• A. True
• B. False
• C. Uncertain
• D. Rare

Answer: (A)

Atrial fibrillation (AF) is indeed recognized as a condition that can occur more frequently in long-distance runners, particularly those who have been training intensely for prolonged periods. This phenomenon is often attributed to the impact of extensive endurance training and the associated physiological adaptations that can lead to alterations in the heart’s electrical system.

Long-distance running can induce changes such as atrial dilation and fibrosis due to the high volume of exercise and stretching of the heart chambers. These changes can increase the risk of developing AF, making it more prevalent among endurance athletes. Studies have illustrated a correlation between high levels of endurance activities and the incidence of AF, supporting the assertion that this arrhythmia is not uncommon within this population.

In the context of the options provided, stating that atrial fibrillation is common in long-distance runners is rooted in existing research and clinical observations that highlight its association with high levels of athletic training and the physiological stresses involved.