title: The mediating role of intention and stages of change in physical activity among adults with physical disabilities: an integrative framework.
abstract: The study's purpose was to identify the mediating role of intention and the stages of change (SOC) in physical activity (PA) over a 6-month period using two models (theory of planned behavior [TPB] and TPB/SOC). Participants were 143 adults with physical disabilities (70.68% response rate; M age = 46.03). The TPB constructs, SOC (time 1), and PA (time 2) were assessed using standardized self-report questionnaires. Based on path analyses, attitude had the highest effect on intention and SOC followed by perceived behavioral control within both well-fit models. The variance in PA explained by the first (TPB) and second (TPB/SOC) models was 16% and 28% respectively. In the just identified model of TPB/SOC, the direct effect of SOC on physical activity remained strong (gamma(soc.pa) = .45) and SOC approached full mediation through attitude. Health promotion interventions need to include both intention and behavior elements (SOC) reinforcing increased PA value and barrier elimination.
authors.affiliation: Department of Kinesiology, Louisiana State University, Baton Rouge, LA 70803, USA.
authors.forename: Maria
authors.initials: M
authors.lastname: Kosma
authors.forename: Rebecca
authors.initials: R
authors.lastname: Ellis
authors.forename: Bradley J
authors.initials: BJ
authors.lastname: Cardinal
authors.forename: Jeremy J
authors.initials: JJ
authors.lastname: Bauer
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: McCubbin
mesh_terms: D000328:Adult; D006233:Persons with Disabilities; D015444:Exercise / Q000523:psychology*; D005260:Female; D006801:Humans; D033182:Intention; D020407:Internet; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011795:Surveys and Questionnaires; D014481:United States