Phase I of cardiac rehabilitation relates to the period of hospitalization following an acute cardiac event. The goals are to condition the patient, make them functionally independent, and provide counseling on nutrition, psychology, and secondary prevention. Phase II encompasses the immediate post-discharge period of 4-6 weeks, focusing on resuming physical activity and managing anxiety/depression through education, telephone follow-ups, and home visits. Phase III incorporates ongoing exercise training, education, and psychosocial/vocational interventions over 6-12 weeks to further functional goals and manage lifestyle changes long-term. Phase IV constitutes lifelong maintenance of lifestyle changes through continued professional monitoring.