Abstract
This study investigated the effect of 8-weeks circuit weight training(CWT) on fasting levels of ghrelin, peptide YY(PYY) in overweight(BMI23) college students. Resistance training consisted of three sets of circuit weight training for 8-10 stations and at an intensity corresponding to 40-60% of one-repetition maximum. The maximum number of repetitions in each station was 15. Body composition, plasma ghrelin, PYY, leptin, and insulin were measured at before, and after CWT. Subjects were divided control group(CON, lost less than 5% of body weight, n=10) and weight loss group(WL, lost more than 5% of body weight, n=8) after completion of CWT. The statistical analysis was evaluated by ANOVA for repeated measures. CWT caused significant decrease of body weight, fat, leptin, insulin and increase of ghrelin, but PYY decrease was not significant. Body weight and body fat loss in WL was greater than CON, but hormone changes were not affected with weight loss. CWT increased circulating ghrelin, an orexigenic factor, but moderate(5%) weigh loss was not altered physiological appetite biomarkers.
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