Obese adolescents are submitted to a multiprofessional weight loss program, which is formed by doctors, nutritionists, physiotherapists, psychologists,and physiologists. The volunteers have intervention 3 times a week during one year, where they practice exercises, have nutrition and psychology counseling, and physiotherapy orientation. Once a month they have an appointment with the doctor. The hypothesis of this study is that a multiprofessional therapy is able to improve anthropometric and biochemical parameters, and also the quality of life of obese adolescents.

The volunteers are submitted to 10 exams (electrocardiogram, polysomnography, blood collection, body composition, rest metabolic rate, DXA, abdominal and carotid ultrasonography, lung function evaluation, ergospirometric test) 3 times a year (baseline, middle and at the end of the year). They also answer nutrition, sleep and psychology questionnaires.

Inclusion Criteria:

• present obesity ( BMI > 95th)
• aged between 15-19 years old
• be able to practice exercise

Exclusion Criteria:

• pregnancy
• use of drugs
• secondary obesity