This study examined the ability of several diagnostic and psychological indicators to predict the use of excessive exercise as a weight loss or compensatory behavior for adolescent patients with symptoms of anorexia nervosa (AN) or bulimia nervosa (BN) in a community outpatient sample. It was hypothesized that the additional assessment of eating attitudes, preoccupation with dieting and oral control, bulimia and food preoccupation, body dissatisfaction, drive for thinness, and overall psychological functioning would enhance the predictability of excessive exercise use. Participants were male and female adolescent outpatients from the Levine Children's Hospital Center for Disordered Eating in Charlotte, North Carolina who met diagnostic criteria for AN, BN, or eating disorder - not otherwise specified. Participants completed a demographics questionnaire, the Obligatory Exercise Questionnaire, the Eating Attitudes Test-26, and the Eating Disorders Inventory-3. Information related to patients' body mass index, eating disorder diagnosis, and global assessment of functioning was also collected. Results of this study revealed that overall eating attitudes scores alone are sufficient in predicting excessive exercise use. The additional assessment of dieting and oral control, bulimia preoccupation, body dissatisfaction, drive for thinness, and overall psychological functioning did not enhance the predictability of excessive exercise use. The difficulty of conducting research with psychological patients within a medical institution, study limitations, and future directions are discussed.