Physical fitness contributes to longevity by promoting overall health, reducing the risk of chronic diseases, and enhancing quality of life. Regular exercise supports cardiovascular health, strengthens bones, improves mental health, and boosts metabolism. Engaging in physical activity helps maintain a healthy body weight and reduces the risk of conditions like heart disease, diabetes, and certain cancers. Additionally, fitness can improve mobility and functional abilities, leading to greater independence in older age. Overall, an active lifestyle promotes longevity and enhances the well-being of individuals throughout their lifespan.