Aerobic exercise, such as running, cycling, and swimming, improves cardiovascular fitness by enhancing the heart and lungs' efficiency. Engaging in consistent aerobic activities increases heart rate and oxygen consumption, which strengthens the cardiovascular system and boosts endurance. As cardiovascular fitness improves, the body becomes more efficient at transporting oxygen to muscles, allowing for enhanced overall performance. Regular aerobic exercise also contributes to overall health, reducing risks for chronic diseases and promoting a better quality of life.