Exercise plays a critical role in preventing chronic diseases such as heart disease, diabetes, and obesity. Regular physical activity helps maintain a healthy body weight, reduces blood pressure, and improves cholesterol levels. It enhances insulin sensitivity, which is vital for blood sugar regulation, thereby lowering the risk of type 2 diabetes. Furthermore, exercise strengthens the immune system, promoting better overall health. By adopting a physically active lifestyle, individuals can significantly mitigate their risk of chronic conditions, leading to improved longevity and enhanced quality of life.