The mediating role of intention and stages of change in physical activity among adults with physical disabilities: an integrative framework

J Sport Exerc Psychol. 2007 Feb;29(1):21-38. doi: 10.1123/jsep.29.1.21.

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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adult
  • Disabled Persons*
  • Exercise / psychology*
  • Female
  • Humans
  • Intention*
  • Internet
  • Male
  • Middle Aged
  • Prospective Studies
  • Surveys and Questionnaires
  • United States