The contribution of anxiety and food restriction on physical activity levels in acute anorexia nervosa

Kristian Holtkamp · Johannes Hebebrand · Beate Herpertz‐Dahlmann

141 citations0/0 files storedInternational Journal of Eating Disorders

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Abstract

OBJECTIVE: 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. METHODS: 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. RESULTS: The regression model explained 64% (R(2) = .64, p = .000) of the variance of physical activity. Only food restriction (p = .006) and anxiety (p = .004) contributed significantly to the variance. DISCUSSION: Our results indicate that anxiety symptoms and food restriction synergistically contribute to increased levels of physical activity in the acute phase of AN.

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References

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2005Physical Activity and Restlessness Correlate with Leptin Levels in Patients with Adolescent Anorexia Nervosa 2018A comparative network analysis of eating disorder psychopathology and co-occurring depression and anxiety symptoms before and after treatment 2013Use of the Compulsive Exercise Test With Athletes: Norms and Links With Eating Psychopathology 2007Physical activity and cortisol in Anorexia Nervosa

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