思春期における持久性トレーニングは左室形態に影響を与えるか

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In general, mature athletes involved in endurance-training demonstrate an increase in left ventricular dimension and mass. The results of previous reports, however, are quite variable, regarding the effects of endurance-training on the cardiac structure of adolescents. This study was designed to clarify whether or not, chronic endurance-training affects the left ventricular structure in adolescence. The subjects were 245 healthy males who were aged 13-18 years and were free of cardiac disorders. In these subjects, 151 subjects (Exercisegroup) had been engaged in endurance sports, and 94 subjects (Controlgroup) had not participated in regular vigorous exercise training. The parameters of cardiac structure (i.e. left ventricular end-diastolic dimension (LVDd), left ventricular wall thickness (LVWT), and left ventricular mass (LVM)) were obtained from echocardiography at rest. The 1500 m performance test in the Exercise group showed significant increase in endurance fitness compared to the Control group. There was no significant difference in the LVWT between the Exercise group and Control group. The LVDd and LVM increased in proportion to the body surface area in both groups. The LVDd and LVM exceeded the 95th percentile of control in 26.5% and 14.6% subjects of Exercise group, respectively. The indices of LVDd and LVM (i.e. the values normalized by body surface area) were significantly increased in the Exercise group compared to the Control group. In conclusion, the chronic endurance-training in adolescence can highly affect the left ventricular structure and endurance fitness.
日本運動生理学会の論文
1998-03-31

思春期における持久性トレーニングは左室形態に影響を与えるか

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