Regular exercise induces several physiological changes, including improved cardiovascular fitness, increased muscle strength, enhanced flexibility, and elevated metabolic rate. These adaptations support better oxygen transportation throughout the body, allowing for more efficient energy use during activities. Moreover, regular exercise stimulates the release of endorphins, promoting feelings of well-being. It also positively impacts the hormonal balance and improves insulin sensitivity, contributing to overall metabolic health. Together, these changes lead to enhanced physical performance, health, and longevity.