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운동생리학 : 트레이닝에 따른 운동선수의 좌심실 구조 변화가 수축력에 미치는 영향
이상민(SangMinYi),고성경(SeongKyeongKo),이성규(SungKyuLee) 한국체육학회 2002 한국체육학회지 Vol.41 No.3
To study on the left ventricular contractility in physical training athletes, 55 subjects were selected in university male students. Subjects were divided into 4 groups by the training type; Control(n=7), Endurance Athletes(EA, n=9), Muscular Athletes(MA, n=12), Combined Athletes(CA, n=27). To evaluate the left ventricular contractility of subjects, R amplitude of chest V<sub>1</sub>, V<sub>5</sub>, V<sub>6</sub> lead were recorded by 12 leads ECG, and to test the left ventricular hypertrophy, left ventricular mass, thickness of posterior wall and septum, %shortening and %fraction were calculated by M-mode Echocardiography. Results of this study are following,1. Resting blood pressure, HR, and RPP of athletes were lower than Control, especially SBP, HR and RPP of MA were significant different from Control(p<.05).2. In electrocardiogram, RV<sub>5</sub>, SV<sub>1</sub>+RV<sub>5</sub>, RV<sub>6</sub>/RV<sub>5</sub> of athletes were significant different from Control(p<.05), especially each of SV<sub>1</sub> and SV<sub>1</sub>+RV<sub>5</sub> in MA was 15.3mm and 36.1mm that was exceed criteria of hypertrophy.3. In echocardiography, septum thickness of EA, mass, septum and posterior wall thickness of MA, and mass of CA were significant different from Control(p<.05).4. In electrocardiogram and echocardiography, pearson correlation had a significance(p<.05) ; SV<sub>1</sub>+RV<sub>5</sub>-shortening(r=-.985), RV<sub>6</sub>/RV<sub>5</sub>-mass(r=-.944), RV<sub>6</sub>/RV<sub>5</sub> - fraction(r=-.845).Results of this study indicate that the cardiac contractility and left ventricular mass of athletes were superior than Control, especially contractility and mass of MA were clearly different among the groups. In index of contractility, SV<sub>1</sub>+RV<sub>5</sub> was more explained shortening of cardiac muscle, and RV<sub>6</sub>/RV<sub>5</sub> was more expressed the volume change and the mass of left ventricle of the Ordinary People in North Korea.
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