· Lennard Zinn is a household name among serious cyclists.
· Dr. John Mandrola is a cardiac electrophysiologist and an active cyclist with an athlete's heart condition.
· Dozens of professional cyclists and triathletes have retired prematurely in recent years because of athlete's heart. Media interest in heart problems among athletes is high.
· Mainstream media have covered sudden deaths in endurance sports events.
· Follows on the success of Fast After 50, a guide for older endurance athletes.