Physical activity influences longevity by reducing the risk of chronic diseases, such as heart disease, diabetes, and certain cancers. Engaging in regular exercise promotes better cardiovascular health, enhances **metabolism**, and supports weight management, all of which contribute to a longer life. Exercise also has positive effects on mental health, alleviating stress and anxiety, thus encouraging a healthier outlook on life. Overall, maintaining an active lifestyle is crucial for enhancing **quality of life** and **extending lifespan**.