Abstract
This study tested a longitudinal model examining the roles of motivation and perceived competence in the prediction of physical activity (PA) and healthy eating (HE) in individuals with cardiovascular diseases, and the effects of adopting these behaviors on individuals’ health. Participants completed measures of global motivation (baseline), contextual motivation and perceived competence for PA and HE (3 months), and self-reports of PA and HE behaviors (6 months). Physiological indicators and life satisfaction were assessed at the baseline and at 12 months. Structural equation modeling supported that individuals with self-determined motivation (SDM) were more likely to feel competent in changing their lifestyle and to engage in moderate and strenuous (vs. mild) exercise and HE behaviors, which had beneficial effects on individuals’ physiological and psychological health. This research confirms the respective roles of SDM and perceived competence in the health behavior change process and emphasizes the key function of SDM in the adherence of healthy behaviors over time.
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