Mitochondrial Bioenergetics and Cardiac Rehabilitation: Bridging Basic Science and Clinical Practice.

Cardiovascular diseases (CVDs) are the leading cause of global morbidity and mortality, underscoring the necessity of long-term secondary prevention strategies such as comprehensive cardiac rehabilitation (CR). CR is a clinically validated, cost-effective intervention that mitigates cardiovascular risk, improves functional capacity, and enhances patient prognosis. Emerging evidence emphasizes the pivotal role of mitochondrial bioenergetics in mediating the systemic benefits of exercise-based CR, particularly through mechanisms involving mitochondrial biogenesis, dynamics, and mitophagy. This review synthesizes molecular insights with clinical guidelines by evaluating four national CR guidelines-from Poland, France, the United States, and Portugal-alongside a comprehensive recommendation issued by the European Society of Cardiology (ESC). The analysis focused on key components of CR, including exercise modalities (aerobic, resistance, and high-intensity interval training) and prescription parameters such as frequency, intensity, and duration. Only guidelines fulfilling predefined inclusion criteria with complete and detailed data were included; documents lacking essential information were excluded from the final synthesis.