OBJECTIVES The current study aimed at identifying the theoretical relation of the transtheoretical model (TTM) to explain physical activity in Korean adults with physical disabilities. METHODS A total of 194 participants ( Age Mean = 48.65 years) were voluntarily recruited for this study. Dissemination sources for participant recruitment included: (a) a press release issued through the authors’ university; (b) recruitment flyers posted on various websites (e.g., Independent Living Centers, Rehabilitation Research and Training Centers, Veteran’s Administration Hospitals); and (c) announcements made through and in conjunction with the Rehabilitation Research and Training Center on Health and Wellness consortium members. Through these procedures, 194 adults (80.83%) completed the survey form; there were 113 males (58.3%) and 81 females (41.7%). The remaining 46 (19.17%) were excluded because they did not complete the survey form or return. RESULTS Results indicated that the TTM constructs assessed were significantly (P < 0.001) associated with the stages of change for physical activity. The largest portion of variance was derived from the behavioral processes of change (ƞ² = .40), followed by self-efficacy (ƞ² = .30), the pros for exercise (ƞ² = .19), the cognitive processes of change and the cons for exercise (ƞ2 = .16, respectively). Moreover, four discriminant functions (i.e., composite scores of the predictors) were produced in the first DDF analysis. These accounted for 71.0% (Wilks’ Λ = .31, χ²  = 368.04, P < .001), 20.9% (Wilks’ Λ = .66, χ²  = 129.91, P < 0.001), 6.3% (Wilks’ Λ = .88, χ²  = 39.39, P < 0.05), and 1.8% (Wilks’ Λ = .97, χ²  = 9.04, P = .62), respectively, of the betweengroup (stage of change) variability. CONCLUSIONS The results provide further cross-sectional support for the internal validity of the transtheoretical model, as the processes of change, self-efficacy, and decisional balance were important variables of a stage of change for physical activity, Additionally, the study is in general agreement with existing evidence among nondisabled populations and, therefore, it supports the external validation of TTM to a unique and understudied population segment.
Conflict of Interest