How to Protect Your Heart for the Miles Ahead with Dr. John Mandrola, Lennard Zinn and Chris Case

It’s been said that if a little does a good job, then a lot is even better and too much is probably just right.

However, evidence indicates that too much exercise, like that experienced by years of endurance sports, can lead to what is known as “athlete’s heart” – a host of conditions easy for physicians to misdiagnose.

In this episode, we are joined by Dr. John Mandrola, Lennard Zinn, and Chris Case, the co-authors of The Haywire Heart. Their book details numerous case studies, including that of co-author Lennard Zinn and the event that nearly killed him.

Today, Lennard shares the story of his initial cardiac episode, diagnosis, and his new perspective on fitness as he still participates in endurance sports.

Dr. John Mandrola 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 seeking medical news and expert perspectives. He is a also a regular columnist for and VeloNews magazine.

This interview is informative, cautionary, and, at the same time, inspirational.

Don’t forget: RunnersConnect members with training plans and / or Masters Subscriptions can get The Haywire Heart for 20% off by logging onto the RunnersConnect Dashboard > Resources > Member Perks.

Haywire Heart Image

Here are some of the topics we’ll discuss today:

  • What is, and what causes, “athlete’s heart”
  • Various risk factors
  • What can life be like after a cardiac diagnosis
  • How to recognize symptoms
  • How to work with your physician
  • Types of treatment available
  • Questions Guests are asked:

    3:46 Was part of your intention with The Haywire Heart to dispel the myth that ‘more is better”?

    5:10 What is “athlete’s heart”

    7:17 What is the most common heart condition caused by overtraining?

    8:53 Lennard, what is your background as a cyclist and what led up to your diagnosis?

    14:15 What are some of the symptoms you experience now?

    15:16 What do you do when you experience your arrhythmia during exercise?

    16:40 Dr. Mandrola, what is the risk of this for endurance athletes?

    18:03 Is someone more at risk if they started running at a younger age vs. started later in life?

    19:27 What were some of the difficulties in studying this?

    21:44 Are there any other factors that might have influenced why there are fewer women with arrhythmias?

    23:37 Is there a correlation between women being shorter than men that may reduce the risk in women?

    24:05 For how long has this been studied?

    24:43 Lennard, do you still cycle competitively?

    30:39 How does living at higher elevation affect this condition?

    32:21 How long have you been living in Boulder?

    35:24 Were there any significant patterns that tied the case studies in the book together?

    39:13 What types of treatments are available for arrhythmia?

    41:42 Lennard, what type of business do you run in Boulder?

    42:30 Were you trying to create an optimistic tone with your book?

    43:57 Dr. Mandrola, are there any ways to reduce risk of “athlete’s heart”?

    46:28 What would you recommend someone do if they experience symptoms?

    50:30 The Final Kick Round

    Quotes by Guests:

    “The heart is a muscle, just like the bicep; if you do curls and weight lifting, like endurance exercise, your heart’s going to adapt. And endurance training causes lots of different changes to the heart.”

    “I was about 15 minutes into this half-hour climb and I looked down and saw that my heart rate was now 220 (bpm) and it just stayed there; I just kept riding. And I felt fine. But after seven minutes of continuing that way and it never came down, then it seemed like that’s not the greatest thing to do to keep going.”

    “I think in the coming years and decades, we’re going to learn more about women athletes and heart disease because more and more women are doing endurance athletics.”

    “People seemed to follow a similar pattern in that initially they would essentially be in denial, and then there was the realization that this was something serious and there was the contemplation of how this is going to change my life / is this going to ruin my life / how will I ever be able to do what I love, and then, of course… hopefully, they will continue down the path that Lennard took and realize that this doesn’t mean that they have to never do what they love to do.”

    “Pay attention to symptoms. Don’t ignore excessive trouble breathing or a racing heart that seems out of proportion to the effort.”
    “Always leave enough energy for the post-race party.”

    Take a Listen on Your Next Run

    Want more awesome interviews and advice? Subscribe to our iTunes channel

    Mentioned in this podcast:

    Book: The Haywire Heart;
    Book: Born To Run
    Book: The Sports Gene
    Book: Slaying The Badger
    Moots Bikes
    8 Things You Need To Know About Electronic Shifting

    We really hope you’ve enjoyed this episode of Run to the Top.

    The best way you can show your support of the show is to share this podcast with your family and friends and share it on your Facebook, Twitter, or any other social media channel you use.

    If more people who know about the podcast and download the episodes, it means I can reach out to and get through to the top running influencers, to bring them on and share their advice, which hopefully makes the show even more enjoyable for you!

    Thank you to our sponsors for supporting Run to the Top

    Enter to win a FREE 6-Pack of Perfect Amino from BodyHealth

    body health

    Use coupon code TINA for 10% off at


    Have a running friend who would love this? Share it...

    Connect with Jeff Gaudette on Google+

Leave a Reply

Your email address will not be published. Required fields are marked *

Adding new comments is only available for RunnersConnect Insider members.

Already a member? Login here Want to become an Insider for free?.Register here