The best type of exercise for improving cardiovascular health is aerobic exercise, which includes activities like running, cycling, swimming, and brisk walking. These exercises elevate the heart rate, promoting better heart function and circulation. Regular aerobic activity strengthens the heart muscle, increases lung capacity, and improves overall endurance. Guidelines recommend at least 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity aerobic exercise weekly. This form of exercise significantly reduces the risk of heart disease and improves overall cardiovascular fitness.