athlete's heart

or athletic heart

noun

nonpathological enlargement of the heart resulting from intensive aerobic exercise.

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Words nearby athlete's heart

athetosis, athirst, athleisure, athlete, athlete's foot, athlete's heart, athletic, athletic heart, athletic shoe, athletic support, athletic supporter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Medical definitions for athletic heart

athletic heart
[ ăth-lĕt′ĭk ]

n.

Enlargement of the heart observed in some athletes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.