Response to Acute Exercise in Eating Disorders

Inclusion Criteria: * Aged 16-25 * ED participants must meet full criteria for DSM-5 restrictive-spectrum eating disorders characterized by weight and shape concern, I.e., anorexia nervosa (AN); mild, moderate, or in partial remission), atypical AN, and OSFED -AN type only) * ED participants must be medically stable, and suitable for outpatient treatment * Biological Females, Assigned Female at birth * English Speaking Exclusion Criteria: * Those with a medical condition that precludes exercise (e.g., severe asthma) will be excluded for any contraindications * Biological Males, Assigned Male at birth * BMI less than 16 (over 18 years) or less than 75% expected body weight (under 18 years) * Reported intake on Eating Disorder Examination \<1000kcal daily * Current purging \>1x per day * Current regular episodes of objective binge eating (\>1x/wk) * Current self-report of loss-of control eating per the Eating Disorders Examination Interview * ED related hospitalization, partial hospitalization, or residential treatment in the past month * Any endorsed medical concerns related to physical activity (as probed in the phone screening questions regarding cardiovascular, pulmonary, or metabolic disease). * Major medical disorders (e.g., cancer, AIDS) * Physical discomfort or difficulty with blood draws * Psychotic disorders * Intellectual disabilities * Developmental disorders * Active substance use disorder * Current suicidal risk per the Ask Suicid…