Prediction of intentions to be physically active in patients with diabetes

Abstract

Background. Theory of planned behavior (TPB) is known as a useful framework for studying physical activity (PA) behavior in general population. But generalizibility of findings to clinical populations may be problematic and studies have shown mixed support of psychosocial factors whithin the TPB framework. The aim of this study is to examine expanded model of TPB for PA behaviour in patients with diabetes. Methods. Longitudinal study included 285 patients with diabetes. PA was measured twice using PA scale from SDSCA measure. Variables within TPB were developed based on the recommendations made by Ajzen (2006). Cronbach alphas varied from .63 to .87. Findings. Perceived behavioral control (PBC), injunctive and descriptive norms were the significant predictors of intentions (p < .05). Emotional and cognitive attitudes as well as past PA were not related to intentions to exercise (p > .05). PBC, but not intentions, predicted PA. Discussion. Enhancing self-efficacy and strengthening positive relationships with members of the team involved in the treatment should be considered developing interventions aimed at increasing the motivation of patients with diabetes to regularly practice physical activities.