Aerobic exercise benefits cardiovascular health by improving heart efficiency and promoting better blood circulation. It enhances lung capacity, allowing the body to utilize oxygen more effectively. Regular aerobic activity reduces the risk of heart disease by lowering blood pressure, improving cholesterol levels, and aiding in weight management. Additionally, engaging in activities like running, cycling, or swimming strengthens the heart muscle and increases endurance. Over time, these benefits contribute to overall improved health and a longer lifespan.