In this episode we take a deep dive into a subject that Case knows well, and that our guest, Lennard Zinn, has lived for the last five years: Heart arrhythmias in endurance athletes. Chris and Lennard, along with Dr. John Mandrola, wrote a book entitled “The Haywire Heart” that details how and why long-term endurance exercise could cause a variety of heart arrhythmias. We’ll also hear from Jeremy Powers, who dealt with his own heart arrhythmia this past cyclocross season.

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