title: Physical Activity, Physical Fitness, and Body Composition of Canadian Shift Workers: Data From the Canadian Health Measures Survey Cycles 1 and 2.
abstract: OBJECTIVE
  The aim of the study was to compare objectively measured physical activity, sedentary time, physical fitness, and body composition in shift workers (SWs) with those who work regular days.
  
  
  METHODS
  Population-based, cross-sectional data from the Canadian Health Measures Survey (n = 4323) were used. Univariate and multivariate linear and logistic regression models were used to compare outcomes between SWs and day workers.
  
  
  RESULTS
  In unweighted analyses, SWs were more likely to have poor body composition, although had fewer minutes per week of sedentary time. Despite no differences in physical activity, SWs had a lower aerobic capacity. In weighted analyses, only differences in aerobic capacity were observed.
  
  
  CONCLUSIONS
  This analysis confirms previous findings that SWs have poorer body composition than day workers, and suggest that SWs may need to engage in more physical activity to achieve the same aerobic capacity as day workers.
authors.affiliation: School of Population and Public Health, University of British Columbia (Ms Neil-Sztramko, Dr Gotay); Centre of Excellence in Cancer Prevention, University of British Columbia (Dr Gotay); British Columbia Cancer Research Centre, Vancouver, Canada (Dr Gotay); Department of Physical Therapy, University of British Columbia (Dr Campbell); Occupational Cancer Research Centre, Cancer Care Ontario, Toronto, Canada (Dr Demers); Dalla Lanna School of Public Health, University of Toronto, Toronto, Ontario, Canada (Dr Demers).
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Neil-Sztramko
authors.forename: Carolyn C
authors.initials: CC
authors.lastname: Gotay
authors.forename: Paul A
authors.initials: PA
authors.lastname: Demers
authors.forename: Kristin L
authors.initials: KL
authors.lastname: Campbell
mesh_terms: D061725:Accelerometry; D000293:Adolescent; D000328:Adult; D015308:Anaerobic Threshold; D001823:Body Composition; D002170:Canada; D003430:Cross-Sectional Studies; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D010561:Personnel Staffing and Scheduling; D010809:Physical Fitness / Q000502:physiology*; D014940:Work Schedule Tolerance / Q000502:physiology*; D055815:Young Adult