Relating to bradycardia, a medical condition where the heart beats abnormally slowly, typically fewer than 60 beats per minute.
From Greek 'bradys' (slow) + 'kardia' (heart) + '-ic' (adjective suffix); the term dates to medical terminology of the 1800s.
Elite endurance athletes often develop bradycardic hearts—a cyclist's resting heart rate might be 40 bpm instead of normal 70 bpm, which actually makes them more efficient because their hearts don't have to work as hard to pump blood through trained cardiovascular systems.
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