Key result
Running and walking over 100 km/day for 6 days immediately increased left ventricular mass by more than 30% and temporarily decreased cardiac function, which recovered within a week.
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May warrant caution with extreme endurance events in middle-aged men; leaves open long-term clinical significance.
Clinical Implications of Changes in Cardiac Structure and Function after Extreme Endurance Exercise► See the article "Effects of Super-ultramarathon Running on Cardiac Structure and Function in Middle-aged Men" in volume 28 on page 202.
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Hyun‐Jin Kim (2020) conducted an editorial in Extreme endurance exercise (n=15). Super-ultramarathon running vs. Baseline (before the marathon) was evaluated on Left ventricular mass (>30% increase). Running and walking over 100 km/day for 6 days immediately increased left ventricular mass by more than 30% and temporarily decreased cardiac function, which recovered within a week.
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