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KMID : 1146220200280030202
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Journal of Cardiovascular Imaging
2020 Volume.28 No. 3 p.202 ~ p.210
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Effects of Super-ultramarathon Running on Cardiac Structure and Function in Middle-aged Men
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Kim Young-Joo
Park Kyoung-Min
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Abstract
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BACKGROUND: It remains unclear whether high-intensity exercises result in deformities and reduced function of cardiac muscle. This study hypothesized that participants in a six-day super-ultramarathon (622 km) with sleep deprivation would show serial changes in cardiac structure and function pre- and post-marathon and during the recovery period.
METHODS: Cardiac structure and function of middle-aged male volunteers were assessed through echocardiography at pre- and post-marathon, and at 2 recovery periods with a three-day interval.
RESULTS: There were no differences in left ventricular end-diastolic and end-systolic dimensions, and end-diastolic volume between pre- and post-marathon. Interventricular septum thickness, left ventricular posterior wall thickness, left ventricular mass, and mass index significantly increased at post-marathon compared to pre-marathon, which decreased during the recovery period. Stroke volume and left ventricular ejection fraction significantly decreased at post-marathon, while both values increased during the recovery period. There were no significant differences in indices for left ventricular relaxation at each assessment period.
CONCLUSIONS: An extreme endurance exercise could induce temporary myocardial hypertrophy and contractility reduction.
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KEYWORD
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Ultra-marathon, Cardiac function, Middle-age
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