The contribution of anxiety and food restriction on physical activity levels in acute anorexia nervosa
Article first published online: 22 JUL 2004
Copyright © 2004 Wiley Periodicals, Inc.
International Journal of Eating Disorders
Volume 36, Issue 2, pages 163–171, September 2004
How to Cite
Holtkamp, K., Hebebrand, J. and Herpertz-Dahlmann, B. (2004), The contribution of anxiety and food restriction on physical activity levels in acute anorexia nervosa. Int. J. Eat. Disord., 36: 163–171. doi: 10.1002/eat.20035
- Issue published online: 22 JUL 2004
- Article first published online: 22 JUL 2004
- Manuscript Accepted: 21 JAN 2004
- anorexia nervosa;
- food restriction;
- physical exercise;
- excessive exercise;
Excessive exercise is present in 40%–80% of anorexia nervosa (AN) patients. Hyperactivity often plays a role in developing and maintaining AN and represents an obstacle to weight gain in refeeding. Interconnections among caloric restriction, psychopathology, and physical activity in humans with AN are poorly investigated.
Physical activity and food restriction during the last 3 months and status of body image/slimness ideal were assessed by the Structured Interview of Anorexia and Bulimia Nervosa (SIAB) in 30 adolescent patients with acute AN at admission to inpatient treatment. Anxiety, depression, and obsessive-compulsiveness were assessed with the Symptom Check-List-90-Revised (SCL-90-R). A regression model based on the independent variables body mass index, food reduction, body image/slimness ideal, anxiety, depression, and obsessive-compulsiveness was calculated to determine the relevant prediction variables of physical activity.
The regression model explained 64% (R2 = .64, p = .000) of the variance of physical activity. Only food restriction (p = .006) and anxiety (p = .004) contributed significantly to the variance.
Our results indicate that anxiety symptoms and food restriction synergistically contribute to increased levels of physical activity in the acute phase of AN. © 2004 by Wiley Periodicals, Inc. Int J Eat Disord 36: 163–171, 2004.