Kim Young Joo, Park Kyoung Min
Department of Exercise Rehabilitation Welfare, Soojung Campus, Sungshin Women's University, Seoul, Korea.
Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
J Cardiovasc Imaging. 2020 Jul;28(3):202-210. doi: 10.4250/jcvi.2020.0020.
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.
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.
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.
An extreme endurance exercise could induce temporary myocardial hypertrophy and contractility reduction.
高强度运动是否会导致心肌畸形和功能下降仍不清楚。本研究假设，参加为期六天、伴有睡眠剥夺的超级马拉松（622公里）的参与者在马拉松赛前、赛后及恢复期心脏结构和功能会出现一系列变化。
通过超声心动图对中年男性志愿者的心脏结构和功能在马拉松赛前、赛后以及间隔三天的两个恢复期进行评估。
马拉松赛前和赛后左心室舒张末期和收缩末期内径以及舒张末期容积无差异。与马拉松赛前相比，赛后室间隔厚度、左心室后壁厚度、左心室质量和质量指数显著增加，在恢复期下降。每搏输出量和左心室射血分数在赛后显著降低，而在恢复期这两个值均升高。各评估期左心室舒张指标无显著差异。
极限耐力运动可诱发暂时性心肌肥厚和收缩力降低。
