Martin Brady held the world record for the slowest heartbeat in a healthy human .
Sinus Bradycardia eMedicineTrained athletes or young healthy individuals may also have a slow resting heart rate ( e.g . professional cyclist Miguel Indurain had a resting heart rate of 28 beats per minute ) .L'Équipe , France , 2 July 2004 Resting bradycardia is often considered normal if the individual has no other symptoms such as fatigue , weakness , dizziness , lightheadedness , fainting , chest discomfort , palpitations or shortness of breath associated with it .
Bradycardia