John Mandrola Author

Chris Case is the managing editor of VeloNews, and author of "Cycling to Extremes," the groundbreaking VeloNews story that brought the problem of the athlete's heart to widespread attention. Dr. John Mandrola is a cardiac electrophysiologist in Louisville, Kentucky, and is himself an active cyclist who had atrial fibrillation. Lennard Zinn was a member of the U.S. national racing team and is a lifelong endurance athlete. He has reported on major stories for VeloNews for 30 years and is the author of the world's best-selling guide to bicycle maintenance and repair.