Abstract: Objective To compare the effectiveness of aerobic exercise and combined exercises on body fat and biochemical indices among simple obesity adolescents.Methods Totally,43 overweight and obese adolescents were selected from 2014 Jiangsu weight-loss summer camps.Participants were randomly divided into two groups,one group received aerobic exercise,and another group received combined exercises(aerobic exercise combined with core strength training).Both group underwent 6 weeks of exercise intervention.Body weight,body fat percentage(BF%),body mass index(BMI),waist circumference,hip circumference and thigh circumference and biochemical indices including fasting plasma glucose(GLU),serum insulin(INS),total cholesterol (TC),three acyl glycerin(TG),high-density lipoprotein(HDL) and low density lipoprotein(LDL) were measured before and after intervention,respectively.Results After six weeks intervention,both groups showed a significant decline in BMI,waist circumference,hip circumference,and thigh circumference(P<0.05).Nevertheless,improvement of BMI,BF%,waist circumference,hip circumference,thigh circumference and skinfold thickness were greater in combined exercise group than aerobic exercise group.Meanwhile,GLU,INS and blood lipid were changed after intervention.TG,LDL variations had significant difference among two intervention group(P<0.05).Compared with aerobic exercise group,greater improvement of INS was found in combined exercise group(P<0.05).Conclusion After six weeks intervention,aerobic exercise and combined exercise could both improve body fatand metabolic function effectively among overweight and obese adolescents.