Objective: This study aimed to retrospectively evaluate the impact of cardiac rehabilitation (CR) on functional capacity, depressive symptoms, and the quality of life and sleep in patients with heart disease.

Methods: A retrospective analysis was conducted on patients who participated in a structured CR program. Clinical records were reviewed to compare pre- and post-rehabilitation outcomes. Functional capacity was assessed using the 6-Minute Walk Test (6MWT), while depressive symptoms, health-related quality of life, and sleep quality were evaluated using the Beck Depression Inventory (BDI), the Short Form-36 (SF-36), and the Pittsburgh Sleep Quality Index (PSQI), respectively.

Inclusion Criteria:

• Patients diagnosed with coronary artery disease (CAD), status post-myocardial infarction (MI), stable angina, or those who have undergone cardiac surgery
• Availability of complete pre- and post-rehabilitation clinical records, including 6-Minute Walk Test (6MWT), BDI, SF-36, and PSQI scores.
• Patients classified as stable by a cardiologist prior to the initiation of the exercise program.

Exclusion Criteria:

• Presence of severe orthopedic, neurological, or musculoskeletal disorders that prevent the performance of the 6-Minute Walk Test or exercise training.
• Patients with severe cognitive impairment
• Unstable angina pectoris, uncontrolled arrhythmias, or advanced heart failure (NYHA Class IV) that contraindicates aerobic exercise.
• Patients who dropped out of the rehabilitation program before completion or had more than a 20% absence rate in sessions.
• Patients who underwent major non-cardiac surgery within the last 3 months.

Individual participant data will not be shared due to institutional policies regarding data privacy and the protection of sensitive patient information under national data protection laws.