The Efficacy and Cost-Effectiveness of Behavioral Counseling for Exercise in Men and Women Following Acute Myocardial Infarction (AMI) and Percutaneous Coronary Intervention (PCI)

Purpose: The purpose of this project is to determine how effective the telephone-based counseling program is at helping patients with heart disease become more physically active. Hypotheses to be tested: * Compared to usual care, patients in the physical activity counseling program will: 1. significantly increase total distance measured by an accelerometer and minutes of physical activity at a moderate intensity or higher, 2. have significantly higher generic and heart-disease health-related quality of life, and 3. will lead to greater improvements in the mediators of behavior change (psychosocial variables, i.e. self-efficacy, outcome expectations, etc.) at 26 and 52 weeks; * Changes in the mediators of physical activity will predict changes in physical activity outcomes at 26 and 52 weeks; * The physical activity counseling program is preferable to usual care from the perspective of health care system costs.