Study of Impact of Behavioral Intervention- Exercise, Nutrition, Education- on Body Mass Index (BMI)

This is a long term randomized controlled trial, looking at the impact of a behavioral intervention on BMI,in participants ages 10-20 with a BMI \> 85%. The intervention group will: * have baseline and follow up blood work (fasting insulin, glucose, lipid panel) * have baseline and follow up BMI, blood pressure measurements * see a dietician-minimum of three visits during study * attend monthly, four hour sessions. These sessions include: 1. registration-monitoring of choices of liquid intake using standardized models, monitoring of sedentary behaviors-hours watching television, computer, video games, monitoring of heart rate at baseline and after exercise, monitoring of METs (metabolic equivalents), motivational interviewing, monitoring of exercise abilities (endurance, agility, curl ups, balance, power) 2. one hour of exercise (including strength training) 3. educational lectures on nutrition and the medical aspects of obesity and Type 2 diabetes epidemic 4. projects/games 5. empowerment tools such as leading exercises and presenting food labels for discussion The control group will have: 1. baseline and follow up blood work (fasting insulin, glucose, lipid panel) 2. baseline and follow up BMI and blood pressure measurements 3. visits to dietician (minimum of three visits during study) 4. standard education on nutrition and exercise given during office visit with primary care doctor