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학술저널
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한국사회체육학회 한국사회체육학회지 한국사회체육학회지 제43권 제2호
발행연도
2011.2
수록면
833 - 842 (10page)
DOI
10.51979/KSSLS.2011.02.43.833

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초록· 키워드

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Obesity is associated with an increased risk of cardiac complications that may be due to abnormal cardiovascular autonomic function reflected by reduced heart rate variability. We investigated the effect of a 12-wk exercise program on heart rate variability in middle-aged obese women. Ten middle-aged obese female volunteers with age 56.2±9.29y, % body fat 35.5±2.72% and BMI 27.1±2.8㎏/㎡. The training period was 12-wk, including 5~6 sessions/wk at an intensity of 40~70% of heart rate reserve(HRR), lasting for 60min/session. Measures of heart rate variability, obtained from both time-and frequency domain analysis of 5min ECG recording were as follows: mean RR interval and its standard deviation(SDNN), the mean square successive differences(rMMSSD), the low and high frequency components which were calculated as normalized units and their ratio(LF/HF). After the exercise program, body mass index and % body fat decreased to 4.8% and 5.5% respectively, which was accompanied by decrease in resting heart rate. Exercise training increased rMSSD by 54%, HFnu by 6.3% and decreased LFnu by 5.7%, LF/HF ratio by 12% significantly. The 12-wk exercise program led to changes in HRV indicative of an improvement in cardiac autonomic modulation in middle-aged women with obesity.

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