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http://dx.doi.org/10.5352/JLS.2011.21.2.322

Green Tea Intake and Exercise Reduce Some Biochemical Markers of Obese Adolescents  

Yang, Jae-K. (Division of Environmental Forest Science, Gyeongsang National University, Institute of Agriculture & Life Sciences)
Jung, Ji-Y. (Division of Environmental Forest Science, Gyeongsang National University, Institute of Agriculture & Life Sciences)
Kang, Seol-J. (Department of Physical Education, Gyeongsang National University)
Cheong, Gang-W. (Division of Applied Life Sciences, Gyeongsang National University)
Kim, Jong-C. (Institute of Hadong Green Tea)
Ko, Seong-K. (Department of Physical Education, Daegu University)
Jeong, So-B. (Department of Physical Education, Gyeongsang National University)
Publication Information
Journal of Life Science / v.21, no.2, 2011 , pp. 322-327 More about this Journal
Abstract
The effects of green tea consumption and/or exercise for 12weeks on body weight and select biochemical markers in plasma were evaluated in obese adolescents with a fat ratio of greater than 25%. The subjects were randomly divided into a control group (n=9), green tea consumption group (n=9), exercise group (n=9) and green tea consumption with exercise group (n=9). Subjects in both green tea consumption group and green tea consumption with exercise group were given more than five cups of green tea extract in hot water ($90^{\circ}C$) daily, equivalent to 1.5-1.7 g dry green tea, for 12 weeks. Subjects in both the exercise group and green tea consumption with exercise group participated in a training program (HRmax 60-70%, 60 min/day) for 12 weeks. Control subjects were only given water equal to the quantity of green tea being given to the subjects of green tea consumption. No significant changes body weights were seen in any of these treatments, but the waist to hip ratio was reduced with treatments of both green tea and exercise. The control group showed no significant changes in TNF-$\alpha$, IL-6 and leptin levels. Green tea consumption reduced leptin (p<0.05), TNF-$\alpha$, and leptin levels. Exercise lowered TNF-$\alpha$ (p<0.05), IL-6 (p<0.01), and leptin (p<0.05) concentrations. Meanwhile, a combination of green tea consumption and exercise lowered TNF-$\alpha$, IL-6 (p<0.05) and leptin (p<0.05) levels. These results indicate that green tea consumption and exercise both had a positive effect on the reduction of inflammatory cytokines, TNF-$\alpha$, IL-6 and leptin, in obese adolescents, but no synergistic effect on the reduction of these cytokines.
Keywords
Obese adolescent; exercise; green tea; inflammatory cytokines;
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