**6. Conclusion**

Physical activity has a number of physiological and psychological effects, and it has been shown effective as a preventive and therapeutic variable in diseases such as type 2 diabetes, cardiovascular disease, osteoporosis, depression, anxiety and certain types of cancer. Among patients with BN, the physical activity is a two-edged sword. On one hand, up to about 50% of patients with BN are classified as exercise dependent, and these patients do need to reduce the amounts of weekly physical activity. On the other hand, a randomized controlled trial found an exercise program superior to nutritional counselling and cognitive behavior therapy among young adult females with BN. Future studies need to further address the possible preventive and therapeutic effects of physical activity in this patient population.
