The best type of exercise for improving heart health is typically cardiovascular or aerobic exercise. Activities such as running, swimming, cycling, and brisk walking elevate the heart rate, improving circulation and strengthening the heart muscle. These exercises enhance lung capacity and oxygen uptake, leading to lower resting heart rates and improved overall cardiovascular efficiency. Engaging in moderate-to-vigorous aerobic activities regularly can also aid in managing weight, reducing blood pressure, and improving lipid profiles, all of which contribute to better heart health over time.