Athlete's heart
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It has been suggested that this article or section be merged into Heart Rate. (Discuss)
Athlete's heart is a medical syndrome where an athlete's heart becomes enlarged from exercise, resulting in a lower resting pulse than that of an average person. These changes would indicate heart-disease if observed in a sedentary person, but in an athlete a large heart with a slow resting pulse is the result of normal and healthy physiological adaptions, and indicates a high level of fitness.