Final answer:
To maintain cardiovascular endurance, engage in regular aerobic physical activity for at least 2.5 hours at moderate intensity each week. Strength training exercises can also help improve cardiovascular health.
Step-by-step explanation:
A person should engage in regular aerobic physical activity for at least 2.5 hours at moderate intensity (1.25 hours at vigorous intensity) each week to maintain cardiovascular endurance. This can be achieved through activities like brisk walking, cycling, swimming, or jogging. Additionally, incorporating strength training exercises into the routine can further enhance cardiovascular health. It is important to listen to your body and gradually increase the intensity and duration of exercise over time.