See How to Protect Your Heart at Upcoming Haywire Heart Book Events

The Haywire Heart by Lennard Zinn, Dr. John Mandrola, and Chris CaseLongtime Boulder cyclist and author Lennard Zinn and VeloNews managing editor Chris Case will lead discussions on heart conditions in athletes during upcoming book events along Colorado’s Front Range.

Zinn and Case will offer a short presentation on heart arrhythmias in athletes followed by a Q&A and a booksigning of their just-released book, The Haywire Heart, which was inspired by the VeloNews magazine feature article “Cycling to Extremes” that described Zinn’s scary onset of arrhythmia.

The events are open to the public. Copies of The Haywire Heart (paperback) will be available for purchase at each event for $18.95.

University Bicycles
839 Pearl Street, Boulder, CO 80302
Thursday, April 26th, 7–9 pm
Drinks and snacks provided


Past Haywire Heart Book Events have drawn 70-110 people and have sold out. Request an event using the webform below. 

Too much exercise can kill you. Despite their lean looks and healthy glow, many athletes in their 40s, 50s, and 60s are damaging their hearts by repeatedly pushing to extremes. Training hard for top performance can cause abnormal heart rhythms, called arrhythmias, and these heart conditions can be deadly. Moreover, they are being diagnosed in an alarming number of athletes.

The Haywire Heart is a groundbreaking examination of heart conditions in athletes. Intended for anyone over age 30 who competes in endurance sports like bike races, triathlons, running events and ultrarunning, and cross-country skiing, The Haywire Heart presents new evidence that going too hard or too long can damage your heart forever. Authors Chris Case, John Mandrola, MD, and Lennard Zinn show athletes what to watch for and how to protect their hearts so they can enjoy the sports they love for the rest of their lives. The Haywire Heart is now available in bookstores; in bike, tri, running, and cross-country ski stores; and online. Learn more and read several online excerpts at

Older athletes are pushing their bodies harder than ever in the hope that exercise will keep them healthy and strong into their later years. But The Haywire Heart is the first book to examine the latest findings and reveal a paradoxical truth: Too much exercise, especially at a high and sustained level, can damage your heart irreparably, and sometimes fatally.

The Haywire Heart shares the developing research into a group of conditions known as “athlete’s heart”, starting with a wide-ranging look at the symptoms and how to recognize your potential risk. Leading cardiac electrophysiologist and masters athlete Dr. John Mandrola explores the prevention and treatment of heart conditions in athletes like arrhythmia, atrial fibrillation and flutter, tachycardia, hypertrophy, and coronary artery disease. Case studies present vivid illustrations of the range of conditions facing athletes. A frank discussion of exercise addiction and comprehensive advice on how to talk with your doctor about your condition preface an encouraging review of the treatment options. Athletes will learn about heart irritants, training and rest modifications, effective medications, and safe supplements that can reduce the likelihood of heart damage during exercise.

The Haywire Heart is a groundbreaking and critically important guide to heart care for athletes. By protecting their hearts now and watching for the warning signs, athletes can avoid crippling heart conditions and continue to exercise and compete for years to come.

John Mandrola, MD, is a cardiac electrophysiologist and an active cyclist who had atrial fibrillation. He works in a private cardiology practice where he specializes in heart rhythm disorders. He is Chief Cardiology Correspondent for Medscape, the leading online resource for physicians and healthcare professionals who seek medical news and expert perspectives. He is also a regular columnist for and VeloNews magazine.

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. Case holds a B.S. in Neuroscience and has conducted research at the National Institute of Mental Health. He is a former state champion runner and has medaled at the U.S. national cyclocross championships and master’s world championships.

Lennard Zinn was a member of the U.S. national cycling 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. Zinn has a degree in physics and has built custom bicycles for over 30 years. He is author of the best-selling bike maintenance books Zinn & the Art of Road Bike Maintenance and Zinn & the Art of Mountain Bike Maintenance.

For media copies, excerpts, author interviews, or book purchases, please contact Dave Trendler at VeloPress through or visit to learn more.