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KMID : 0613820170270091047
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Journal of Life Science
2017 Volume.27 No. 9 p.1047 ~ p.1051
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Effect of Circuit Training on Aging-related Hormones in Obese Middle-aged Women
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Son Won-Mok
Kwak Yi-Sub
Kim Kun-Do
Ha Min-Sung
Park Song-Young
Sung Gi-Dong
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Abstract
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Due to aging, the physical fitness of middle-aged women decreases after menopause. This results in increased body fat and reduced lean body mass, both of which can lead to obesity. This phenomenon is accompanied by changes in hormone secretion in the body. The purpose of this study was to analyze the effects of circuit training on aging-related hormones in obese middle-aged women. The subjects were 20 obese middle-aged women. The subjects were divided into two groups: a circuit training group (n=10) and nonexercise control group (n=10). Growth hormone (GH), insulin-like growth factor-1 (IGF-1), estrogen, and DHEA-S were measured before and after the circuit training program. The circuit training group performed circuit training for 12 weeks, three times per week. Exercise intensity was increased gradually from 60% to 80% of heart rate reserve every 6 weeks. In the circuit training group, at the end of the 12-week training program, the IGF-1 levels were significantly increased compared to pre-exercise levels, and they were higher than those of the control group. GH levels were also significantly increased in the circuit training group, but the differences were not statistically significant. DHEA-S was significantly increased in the circuit training group, but the difference was not statistically significant. The results showed that circuit training improved aging-related hormones levels in obese middle-aged women.
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KEYWORD
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DHEA-S, estrogen, GH, IGF-1, obese
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