title: Pathological motivations for exercise and eating disorder specific health-related quality of life.
abstract: OBJECTIVE
  To examine associations among pathological motivations for exercise with eating disorder (ED) specific health-related quality of life (HRQOL).
  
  
  METHODS
  Survey data assessing ED severity (i.e., Eating Disorder Diagnostic Survey), ED specific HRQOL (i.e., Eating Disorders Quality of Life Instrument), and pathological motivations for exercise (i.e., Exercise Dependence Scale) were collected from female students (N = 387) at seven universities throughout the United States. Regression analyses were conducted to examine the associations among exercise dependence, ED-specific HRQOL and ED severity, and the interaction of exercise dependence and ED severity on HRQOL scores.
  
  
  RESULTS
  The overall model examining the impact of ED severity and exercise dependence (independent variables) on HRQOL (dependent variable) was significant and explained 16.1% of the variance in HRQOL scores. Additionally, the main effects for ED severity and exercise dependence and the interaction among ED severity and exercise dependence were significant, suggesting that the combined effects of ED severity and exercise dependence significantly impacts HRQOL.
  
  
  CONCLUSIONS
  Our results suggest that pathological motivations for exercise may exacerbate ED's detrimental impact on HRQOL. Our results offer one possible insight into why exercise may be associated with deleterious effects on ED HRQOL. Future research is needed to elucidate the relationship among psychological aspects of exercise, ED, and HRQOL.
authors.affiliation: Neuropsychiatric Research Institute, Fargo, ND; University of North Dakota School of Medicine and Health Sciences, Fargo, ND.
authors.forename: Brian
authors.initials: B
authors.lastname: Cook
authors.forename: Scott
authors.initials: S
authors.lastname: Engel
authors.forename: Ross
authors.initials: R
authors.lastname: Crosby
authors.forename: Heather
authors.initials: H
authors.lastname: Hausenblas
authors.forename: Stephen
authors.initials: S
authors.lastname: Wonderlich
authors.forename: James
authors.initials: J
authors.lastname: Mitchell
mesh_terms: D016739:Behavior, Addictive / Q000175:diagnosis* / Q000523:psychology; D004522:Educational Status; D015444:Exercise / Q000523:psychology*; D001068:Feeding and Eating Disorders / Q000175:diagnosis / Q000523:psychology*; D005260:Female; D006801:Humans; D007899:Leisure Activities; D055686:Metabolic Equivalent; D009042:Motivation; D011594:Psychometrics; D011788:Quality of Life; D012044:Regression Analysis; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires; D014481:United States; D055815:Young Adult
keywords: eating disorders; exercise dependence; health-related quality of life