Exercise study seeks to unlock eating disorder clues

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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 Suicide Screening Questionnaire * Pregnancy * Psychiatric medications that have not been stable for at least 4 weeks * Acute sedatives / pain killers (e.g., benzodiazepines, opioids) and prescription stimulants (e.g., methylphenidate, amphetamines) are not permitted for the full day prior to the laboratory session. The noted short-term medication holds only apply to subjects taking the noted medications in cases used to treat ADHD or other psychiatric conditions * Resting heart rate \<50 beats per minute (assessed at screening visit) * Low blood pressure (\<90/60), (assessed at screening visit) * Daily cannabis use * History of light headedness or fainting during blood draws or physical activity * History of chest pain during physical activity * Bone, joint, cardiac, pulmonary, metabolic, or other medical conditions that may be worsened by physical activity (e.g., COPD, diabetes, hypertension) that are not currently addressed via medication or lifestyle change. * Physical disabilities that prohibit task performance (such as blindness or deafness) * Any other condition that the investigator believes might put the participant at risk for negative outcomes * Individuals with a restrictive eating disorder presentation that does not include weight and shape concern (ARFID) or that has primary binge eating (bulimia nervosa) * Indication of health risk associated with exercise on the Physical Activity Readiness Questionnaire