The Impact of Family-Based Treatment for Adolescent Anorexia Nervosa on Compulsive Exercise Attitudes and Behaviors.

Objective: While Family-based treatment for anorexia nervosa (FBT-AN) is effective for weight restoration and improvement in eating-related cognitions, its effect on exercise attitudes and behaviors is little studied. Compulsive exercise is common in AN and often challenging to change.

Method: This secondary analysis examined changes in attitudes toward compulsive exercise (Compulsive Exercise Test-CET) and behaviors (Eating Disorder Examination-EDE) using data from a randomized clinical trial testing an adjunctive treatment for adolescents with AN who failed to gain 2.4 kg by Session 4-a predictor of poor outcome. The main hypothesis is that attitudes toward compulsive exercise and decreases in compulsive exercise behavior would improve over the course of treatment.

Results: Participants reported decreases in compulsive exercise attitudes by Session 4 and compulsive exercise episodes by end of treatment (EOT). There were no differences between early FBT responders (weight gain of 2.4 kg by session 4) and early non-responders.

Discussion: These results suggest that FBT facilitates adolescents with AN to change attitudes toward compulsive exercise early in treatment (by Session 4) as well as reduction in compulsive exercise behaviors by EOT. Future studies should assess whether changes in attitudes toward compulsive exercise early in treatment is a mechanism of FBT treatment effect.