title: A systematic review of physical activity in prostate cancer survivors: outcomes, prevalence, and determinants.
abstract: BACKGROUND
  We reviewed physical activity (PA) studies in prostate cancer (PC) survivors investigating (a) the effects of PA on health outcomes, (b) the prevalence of PA, and (c) the determinants of PA.
  
  
  METHODS
  A systematic search of the literature identified nine studies on the outcomes of PA, six studies on the prevalence of PA, and four studies on the determinants of PA in PC survivors.
  
  
  RESULTS
  Results showed promising effects of PA on muscular fitness, physical functioning, fatigue, and health-related quality of life. The prevalence of PA varied widely from <30% to >70%, depending on the type of measure used. PA in PC survivors was predicted by motivational variables such as intentions, perceived behavioral control, and subjective norms.
  
  
  CONCLUSIONS
  Although preliminary research is promising, there remains a significant amount of research to be done on the role of PA in PC survivors. Moreover, future research would benefit from larger samples using randomized controlled trial methodology.
authors.affiliation: Department of Clinical Cancer Research, Division of Cancer Medicine and Radiotherapy, Norwegian Radium Hospital, Rikshospitalet University Hospital, Montebello, Oslo, Norway. lene.thorsen@radiumhospitalet.no
authors.forename: Lene
authors.initials: L
authors.lastname: Thorsen
authors.forename: Kerry S
authors.initials: KS
authors.lastname: Courneya
authors.forename: Clare
authors.initials: C
authors.lastname: Stevinson
authors.forename: Sophie D
authors.initials: SD
authors.lastname: Fosså
mesh_terms: D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D009043:Motor Activity; D015995:Prevalence; D011471:Prostatic Neoplasms / Q000401:mortality* / Q000503:physiopathology / Q000523:psychology / Q000628:therapy; D012307:Risk Factors; D017741:Survivors; D016896:Treatment Outcome