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首页> 外文期刊>The American Journal of Cardiology >Influence of 12 weeks of jogging on magnetic resonance-determined left ventricular characteristics in previously sedentary subjects free of cardiovascular disease.
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Influence of 12 weeks of jogging on magnetic resonance-determined left ventricular characteristics in previously sedentary subjects free of cardiovascular disease.

机译：慢跑12周对先前久坐无心血管疾病的受试者的磁共振测定的左心室特征的影响。

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摘要

Hypertrophy of the left ventricle is a diagnostic dilemma in subjects who engage in regular endurance exercise. We studied prospectively whether endurance training in previously sedentary young and middle-aged men and women can alter left ventricular (LV) characteristics. We recruited 33 healthy young and middle-aged subjects (18 women, 15 men, ages 21 to 59 years) to undergo 12 weeks of home-based brisk walking and jogging at a target heart rate > or =120 beats/min for > or =30 minutes 3 times a week. LV characteristics were measured by cine magnetic resonance imaging. Training intensity as estimated by heart rate correlated positively with the increase in LV myocardial area (r = 0.51, p = 0.005) in the 28 men and women completing the study. In the 13 men and women who trained with heart rate of > or =120 beats/min, LV myocardial area was larger after than before training (17.7 +/- 2.9 vs 16.8 +/- 2.8 cm(2), p <0.05). Moreover, in these subjects LV myocardial area increased more (5.5 +/- 9.0% vs -3.0 +/- 5.0%) than in the 15 men and women who trained at a lower intensity (p <0.05). LV end-systolic and end-diastolic area and ejection fraction did not change significantly. In conclusion, moderate-to-vigorous endurance training at moderate volumes does not influence LV end-diastolic volume or ejection fraction, but has a minor influence on LV hypertrophy in previously sedentary young and middle-aged men and women.
机译：左心室肥大是进行定期耐力运动的受试者的诊断难题。我们前瞻性研究了以前久坐的年轻和中年男女的耐力训练是否可以改变左心室（LV）的特征。我们招募了33位健康的中青年受试者（18名女性，15名男性，年龄在21至59岁之间）进行12周的家庭快走和慢跑，目标心率≥120次/分钟，≥或= 30分钟，一周3次。通过电影磁共振成像测量LV特征。由心率估计的训练强度与完成研究的28位男性和女性的LV心肌面积增加呈正相关（r = 0.51，p = 0.005）。在接受心率≥120次/分钟训练的13位男女中，左心室心肌面积比训练后更大（17.7 +/- 2.9 vs 16.8 +/- 2.8 cm（2），p <0.05） 。此外，在这些受试者中，LV心肌面积的增加（5.5 +/- 9.0％比-3.0 +/- 5.0％）要比强度较低的15位男女增加（p <0.05）。左室收缩末期和舒张末期面积及射血分数无明显变化。总之，中等强度到中等强度的耐力训练不会影响左室舒张末期容积或射血分数，但对以前久坐的年轻和中年男女左心室肥大影响较小。

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