International Journal of Preventive Medicine (Int J Prev Med)2008-7802142017092018291829ENDepartment of Community Nutrition, School of Nutrition and Food Sciences, Shahid Beheshti University of Medical Sciences, TehranDepartment of Public Health, Shahid Beheshti University of Medical Sciences, TehranDepartment of Health Education and Promotion, Ministry of Health, TehranDepartment of Community Nutrition, School of Nutrition and Food Sciences, Shahid Beheshti University of Medical Sciences, TehranDepartment of Food Industry, School of Food Sciences and Industry, Islamic Azad University, KhouzestanDepartment of Community Nutrition, School of Nutrition and Biochemistry, Tehran University of Medical Sciences, TehranDepartment of Community Nutrition, School of Nutrition and Food Sciences, Shahid Beheshti University of Medical Sciences, TehranDepartment of Nutrition, School of Nutrition and Food Sciences, Tabriz University of Medical Sciences, TabrizStudent Research Committee, Cancer Research Center, Shahid Beheshti University of Medical Sciences, TehranStudent Research Committee, Department of community nutrition, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran20170920<p><span class="fontstyle0"><strong>Background</strong>: </span><span class="fontstyle2">Obesity in adolescence is the strongest risk factor for obesity in adulthood. This study aimed to evaluate the effects of a comprehensive lifestyle intervention on different anthropometric indices in 12&ndash;16‑year‑old boy adolescents after 12 Weeks of Intervention. </span></p><p><span class="fontstyle0"><strong>Methods</strong>: </span><span class="fontstyle2">A total of 96 male adolescents from two schools participated in this study. The schools were randomly assigned to intervention (53 students) and control school (43 students). Height and weight of students were measured and their body mass index (BMI) was calculated. Body fat percent (BF) and body muscle percent (BM) was assessed using a bioimpedance analyzer considering the age, gender, and height of students at baseline and after intervention. The obesity reduction intervention was implemented in the intervention school based on the Ottawa charter for health promotion. </span></p><p><strong></strong><span class="fontstyle0"><strong>Results</strong>: </span><span class="fontstyle2">Twelve weeks of intervention decreased BF percent in the intervention group in comparison with the control group (decreased by 1.81% in the intervention group and increased by 0.39% in the control group, </span><span class="fontstyle3">P </span><span class="fontstyle2">&lt; 0.01). However, weight, BMI, and BM did not change signifcantly. </span><span class="fontstyle0">Conclusions: </span><span class="fontstyle2">The result of this study showed that a comprehensive lifestyle intervention decreased the body fat percent in obese adolescents, although these changes was not reflected in the BMI. It is possible that BMI is not a good indicator in assessment of the success of obesity management intervention.<br /></span></p><p><span class="fontstyle0" style="color: #00652e;"><strong>Keywords</strong>: </span><span class="fontstyle3">Adolescence obesity, BMI, body composition, lifestyle intervention</span> <br style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px;" /></p>http://ijpm.mui.ac.ir/index.php/ijpm/article/view/1829http://ijpm.mui.ac.ir/index.php/ijpm/article/download/1829/2118