Anorexia Nervosa is an eating disorder where the people suffering from it exercise extensively and/or restrict the amount of food they eat to lose weight (regardless of if their weight is medically "healthy" or "unhealthy"). Their weight and body-mage are usually closely tied to their self-confidence, emotions, self-esteem, and self-worth. Therefore, their excessive attempts to lose weight can majorly impact both their physical and emotional health.