Anorexia as a mental illness -- Non-medical perspectives of anorexia -- Incidence, risk, and recovery -- Psychological and physical symptoms -- Indirect treatment of anorexia nervosa -- Direct treatments of anorexia nervosa -- Behavioral foundations of activity anorexia -- Motivational basis of activity anorexia -- biological basis of activity anorexia -- Social context of activty anorexia -- Assessment of acitivty anorexia -- Treatment and prevention of activity anorexia