Regular exercise decreases the risk of chronic diseases through various mechanisms, including improving cardiovascular health, enhancing insulin sensitivity, and reducing inflammation. Physical activity strengthens the heart and lungs, promoting better blood circulation and oxygen delivery, which lowers risks for conditions like heart disease and diabetes. Moreover, exercise supports weight management, which is crucial for preventing obesity-related diseases. It also boosts the immune system and can enhance mental health, reducing the risk of conditions such as depression and anxiety. Thus, a consistent exercise routine is key to long-term health.