Barrier self-efficacy and physical activity over a 12-month period in men and women who do and do not attend cardiac rehabilitation.

Objectives: Two primary objectives were to examine (a) changes in physical activity (PA) over a 12-month period in people living with cardiac disease who did not attend cardiac rehabilitation (CR), and (b) the role of barrier self-efficacy in explaining these changes from a gender perspective. A secondary objective was to examine whether attending CR (or not) moderated the gender-barrier self-efficacy relationship with PA. Design and Setting: Participants (N = 801) completed a questionnaire in the hospital and at 2, 6, and 12 months after hospitalization, as well as a telephone-administered 7-day PA recall at 2, 6, and 12 months. Main Outcome Measures: PA and barrier self-efficacy. Results: Hierarchical linear modeling showed significant declines in PA over time, which were especially pronounced for women. Moreover, the association between barrier self-efficacy and PA became significantly weaker over time, especially for women. This trend was similar for participants who did and did not attend CR. Conclusion: Interventions that focus on increasing barrier self-efficacy in people living with heart disease after hospitalization will likely equally benefit men and women in the short term but may disproportionately benefit men in the longer term regardless of participation in CR.