Yes, exercise is good for us, but is there such a thing as too much exercise? Where does exercise makes the transition from an activity that promotes health to one that could be fatal? On this episode, Dr. John Mandrola, a cardiologist, amateur cyclist and co-author of the Haywire Heart, is able to share his insights both as an athlete and a medical expert on cardiac health for a fun, insightful and educational conversation about how your heart adapts to exercise and when too much might be too much.

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