Guido Claessen
Sports cardiologist and researcher focused on how long-term endurance training affects cardiac structure and function, leading longitudinal MRI studies such as Pro at Heart and Master at Heart.
Best podcasts with Guido Claessen
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Feb 20, 2026 • 1h 7min
Does Zone 1 Build a Stronger Heart Than HIIT? New MRI Data with Dr Guido Claessen & Prof Paul Laursen
Dr Guido Claessen, a sports cardiologist who leads long-term MRI studies on endurance athletes. He discusses how low-intensity Zone 1–2 volume, not HIIT, most strongly links to larger cardiac size. They cover MRI methods, mechanisms from chronic wall stress, polarized training balance, recovery variability, and long-term risks like atrial fibrillation and coronary plaque.
