Methodology: test randomized, longitudinal, controlled, two-year intervention field comparing a sample of 120 subjects from 7 to 16 years with central obesity, the effect of two interventions: a) intensive on lifestyle with a reduced calorie DM , physical activity and behavioral therapy, b) non-intensive with healthy diet recommendations following the usual pediatric advice. At 2, 6, 12 and 24 months after follow up changes will be assessed: a) the HOMA index, body fat, and the cardiovascular risk factors, b) diet, sleep patterns, physical exercise using questionnaires and accelerometers (intervention group), and c) the quality of life. genetic and epigenetic markers will be evaluated by genotyping SNPs genes related to RI; and the analysis of: a) DNA methylation in genes related to insulin resistance, b) expression of microRNAs and target genes related to insulin resistance and c) measure the length of telomeres. The therapeutic program will consist of individual sessions and group workshops for the patient and the family.