title: Work environment and psychosocial factors affecting physical activity among Taiwanese information technology professionals: a structural equation modeling approach.
abstract: OBJECTIVE
  To examine the relationships among work environment, psychosocial factors, and physical activity (PA) among information technology (IT) professionals.
  
  
  METHODS
  This was a cross-sectional survey of 576 IT professionals from three IT companies in Taiwan. Structural equation modeling was used to test a theoretically supported model using social cognitive theory, incorporating variables from the demand-control model.
  
  
  RESULTS
  Higher levels of PA were positively associated with supportive workplace environments, positive outcome expectations, and self-efficacy for PA. Self-efficacy partially mediated the effects of supportive workplace environments on PA. Job strain had an indirect effect on PA through self-efficacy. The final model accounted for 31% of the variance in PA.
  
  
  CONCLUSIONS
  Work environment and psychosocial factors are both important. Workplace PA interventions directed toward individuals' self-efficacy and outcome expectations in the context of supportive environments may be useful.
authors.affiliation: School of Nursing, China Medical University, Taichung, Taiwan. yunping@umich.edu
authors.forename: Yun-Ping
authors.initials: YP
authors.lastname: Lin
authors.forename: Tsui-Sui Annie
authors.initials: TS
authors.lastname: Kao
authors.forename: Marjorie C
authors.initials: MC
authors.lastname: McCullagh
authors.forename: Dee W
authors.initials: DW
authors.lastname: Edington
authors.forename: Janet L
authors.initials: JL
authors.lastname: Larson
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D006801:Humans; D007256:Information Systems; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D009043:Motor Activity; D016272:Occupational Health; D013624:Taiwan; D017132:Workplace / Q000523:psychology*; D055815:Young Adult