The body adapts to regular exercise through several physiological changes. Muscle fibers become more efficient, increasing their strength and endurance. The cardiovascular system also improves, with enhanced heart efficiency and increased blood flow, leading to better oxygen delivery to muscles. Regular exercise promotes adaptations in metabolism, enabling improved energy utilization and fat oxidation. Additionally, hormonal changes improve mood and stress resilience. Over time, these adaptations can enhance overall performance, reduce injury risk, and promote long-term health benefits, allowing individuals to sustain higher levels of physical activity.