People with anorexia nervosa are known to engage in significant physical activity or sports. This practice is problematic because of the state of malnutrition, its interference with re-nutrition and the somatic and nutritional complications that the effect of physical activity can cause in these people. This significant physical activity is also called hyperactivity in the literature, it is in fact a problematic use of physical activity, it is a symptom commonly observed in people suffering from anorexia nervosa (in 31 to 80% cases). In this context, Ms. Kern lecturer in Sciences and Techniques of Physical and Sports Activities (STAPS) at the University of Paris Nanterre has developed in collaboration with the clinical team (Pre Godart) an adapted physical activity program (APA) , for patients suffering from anorexia nervosa. The APA program includes 8 sessions of 1h30 including an important part of psychoeducation. The effectiveness of this program will be evaluated in terms of both restoration of body mass index and improvement in overall health. The project's hypothesis is that adding a standardized 8-week Adapted Physical Activity program to the usual care, including psychoeducation on both problematic physical activity and the consequences in terms of good practice of physical activity leads to a better outcome of overall care in people with anorexia nervosa.