What heart rate do elite athletes have?

Elite endurance athletes commonly have resting heart rates of 40 to 50 bpm. Cyclist Miguel Indurain was reported to have a resting rate of 28 bpm, among the lowest recorded in a healthy adult. The athlete's heart has a larger left ventricle and ejects more blood per beat, so it needs fewer beats at rest.

Source: Press reports on Indurain (1990s); Sharma, Merghani & Mont (2015), European Heart Journal