Models of Behaviour Change in a Cardiac Rehabilitation Sample
1Eötvös Loránd University, Institute for Health Promotion and Sport Sciences, Faculty of Education and Psychology, Budapest, Hungary
2Eötvös Loránd University, Psychology Institute, Faculty of Education and Psychology, Department of Personality and Health Psychology, Budapest
Background: The aim of this study was to examine exercise and relaxation in cardiac rehabilitation patients with the Theory of Planned Behaviour (Ajzen, 1991) and Temporal Self-Regulation Theory (Hall and Fong, 2007). Methods: Design: longitudinal; 6 months follow-up. Participants: cardiac rehabilitation inpatients with acute ischemic heart disease aged 65 or below. N=302, 278 (75%) males, mean age 55.61 (SD=7.31). Measures: self-report questionnaire about the variables of the theories. Three versions of TPB and two versions of TST were tested using path analyses. Findings: TPB explained 4–9% of variance in exercise and 14–15% in relaxation. TST explained 9–10% and 19–21% respectively. Model fits (exercise/relaxation): TPB complete model CFI .62/.82, RMSEA .18/.13; basic model: CFI .97/1.00, RMSEA .11/.00, third model CFI .99/.99, RMSEA .09/.05. TST original version CFI .94/.97, RMSEA .12/.09, TST modified model CFI .98/.99, RMSEA .09/.04. Discussion: The predictive powers of the models were low. TST had higher predictive power than TPB; relaxation was better predicted than exercise. The modified TST showed the best model fits. TST is a promising recent model.