title: Relationships between cardiorespiratory fitness, physical activity, and psychosocial variables in overweight and obese breast cancer survivors.
abstract: BACKGROUND
  Breast cancer survivors not only experience distressing physical symptoms associated with treatments, but also are faced with psychosocial challenges. Despite growing scientific evidence that physical activity (PA) may mitigate psychosocial distress experienced by women treated for breast cancer, the literature is equivocal.
  
  
  OBJECTIVE
  This study investigated the relationships between cardiorespiratory fitness (CRF), PA, and psychosocial factors in breast cancer survivors.
  
  
  METHODS
  Data involving overweight or obese breast cancer survivors (N = 260) were examined. CRF was determined by a submaximal graded exercise test. PA, depressive symptoms, total fatigue, and global self-esteem were assessed with self-report measures. Pearson's correlations were conducted to determine associations among CRF, PA, depressive symptoms, total fatigue, and global self-esteem. Multiple regression models, with age and body mass index as covariates, were performed using continuous levels for CRF and PA.
  
  
  RESULTS
  Bivariate correlations suggested that CRF and PA were unrelated to the psychosocial variables. One of the regression models identified a marginally significant (P = 0.06) inverse association between depressive symptoms and PA.
  
  
  CONCLUSIONS
  CRF and PA were not associated with psychosocial factors in this sample of breast cancer survivors. However, minimal PA was reported by the majority of participants, so low PA variability likely influenced these findings.
authors.affiliation: School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA, USA. debbiltaylor@yahoo.com
authors.forename: Deborah L
authors.initials: DL
authors.lastname: Taylor
authors.forename: Jeanne F
authors.initials: JF
authors.lastname: Nichols
authors.forename: Bilgé
authors.initials: B
authors.lastname: Pakiz
authors.forename: Wayne A
authors.initials: WA
authors.lastname: Bardwell
authors.forename: Shirley W
authors.initials: SW
authors.lastname: Flatt
authors.forename: Cheryl L
authors.initials: CL
authors.lastname: Rock
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015992:Body Mass Index; D001943:Breast Neoplasms / Q000453:epidemiology / Q000523:psychology*; D015897:Comorbidity; D003863:Depression / Q000453:epidemiology; D015444:Exercise; D005221:Fatigue / Q000453:epidemiology / Q000523:psychology; D005260:Female; D006339:Heart Rate; D006801:Humans; D008875:Middle Aged; D009765:Obesity / Q000523:psychology; D050177:Overweight / Q000453:epidemiology / Q000523:psychology*; D010100:Oxygen / Q000378:metabolism*; D005082:Physical Exertion; D010809:Physical Fitness / Q000523:psychology; D011788:Quality of Life; D012649:Self Concept; D011795:Surveys and Questionnaires; D017741:Survivors / Q000523:psychology* / Q000706:statistics & numerical data
chemical_list: D010100:Oxygen