Exercise Prescription in Cardiac Rehabilitation

Cardiac Rehabilitation (CR) is an effective exercise-based lifestyle therapy for patients with cardiac disease. There are two common methods of exercise prescription, an effort based exercise prescription and target heart rate based exercise prescription. The purpose of this research study is to identify the best way to exercise in cardiac rehabilitation. There are three main goals of this study. First, the investigators want to know if an exercise test should be done near the beginning of cardiac rehabilitation. Second, the investigators want to understand what type of exercises should be recommend to patients. Third, the investigators want to understand if a personal heart rate monitor will improve adherence to a target heart rate for exercise. As part of this study, some patients will undergo an exercise stress test on a treadmill to determine a target heart rate. These patients will be given a heart rate goal to use when they exercise. Some patients will be given a personal heart rate monitor to improve adherence.