Psychosocial Determinants of Stages of Change and Physical Activity among Adults with Physical Disabilities

in Adapted Physical Activity Quarterly
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A high proportion of individuals with disabilities remain physically inactive. Therefore, this study (web-based survey) investigated the relationships between the Transtheoretical Model (TTM) and physical activity among 224 adults with physical disabilities (M age = 45.4 years, SD = 10.78, females = 71%). Additionally, the most important TTM predictors of the stages of change and physical activity were examined. Standardized self-report scales of the TTM constructs and physical activity were completed. The study findings supported the theorized relationships between the TTM constructs and physical activity. The behavioral and cognitive processes of change distinguished the stages of change. These two constructs and self-efficacy mostly predicted physical activity (R2total = .18). The assessment methodology of the TTM constructs needs to be revisited.

Maria Kosma and Rebecca Ellis Gardner are with the Department of Kinesiology at Louisiana State University, Baton Rouge. E-mail: mkosma@lsu.edu. Bradley J. Cardinal, Jeremy J. Bauer, and Jeffrey A. McCubbin are with the Department of Nutrition and Exercise Sciences at Oregon State University, Corvallis.