Behavioral assessment of the reinforcing effect of exercise in women with anorexia nervosa: Further paradigm development and data
Article first published online: 5 OCT 2009
Copyright © 2009 Wiley Periodicals, Inc.
International Journal of Eating Disorders
Volume 43, Issue 7, pages 611–618, 1 November 2010
How to Cite
Klein, D. A., Schebendach, J. E., Gershkovich, M., Bodell, L. P., Foltin, R. W. and Walsh, B. T. (2010), Behavioral assessment of the reinforcing effect of exercise in women with anorexia nervosa: Further paradigm development and data. Int. J. Eat. Disord., 43: 611–618. doi: 10.1002/eat.20758
- Issue published online: 5 OCT 2009
- Article first published online: 5 OCT 2009
- Manuscript Accepted: 7 AUG 2009
- NIH. Grant Numbers: MH65024, MH71285, MH083795
- anorexia nervosa;
- progressive ratio;
- behavioral economics;
To use a Progressive Ratio (PR) computerized “work” paradigm to measure course and correlates of exercise motivation in in-patients with Anorexia Nervosa (AN).
Sixteen inpatients with AN participated in a PR task assessing the relative reinforcing effect of two different increments of cash versus the opportunity to exercise for upto 30 min, twice; at low weight, and, for n = 10 participants, after weight restoration.
There was a trend toward a higher work for exercise with 2 versus 5 increments of cash as the alternative reinforcer. Exercise breakpoint did not differ between low and normal-weight states. Exercise breakpoint at each time point was correlated with prehospitalization exercise “commitment” (Commitment to Exercise Scale, r = .613, p = .012 at T1; r = .634, p = .049 at T2).
Patients with AN will work at a PR task for access to even a small amount of exercise. Exercise motivation during hospitalization is correlated with prehospital exercise commitment and does not appear to change consistently with weight restoration. © 2009 by Wiley Periodicals, Inc. (Int J Eat Disord 2010;)