Inclusion Criteria:  girls between 12 and 18, affiliated to a social security with behavioral eating disorder characterized by a drastic reduction in intakes resulting in weight loss and a BMI ≤ 17.5 kg / m2. Anorexia can be restrictive pure or associated with bulimia or, with a BMI projecting ≥ 30 kg / m2 at the age of 18 (IOTF C30) or, without BMI abnormality, without eating disorders, without serious medical pathology  Exclusion Criteria:  for anorexics, uncorrected nutritional deficiency for the obese, secondary obesity for all, inability to provide informed consent, pregnancy or breastfeeding, heart disease, high blood pressure, sleep apnea syndrome, dyslipidemia, diabetes, chronic pathology including inflammatory.