What is “cardio respiratory endurance (cardio respiratory fitness)?
Cardio respiratory endurance is the ability of the body’s circulatory and respiratory systems to supply fuel during sustained physical activity. To improve your cardio respiratory endurance, try activities that keep your heart rate elevated at a safe level for a sustained length of time such as walking, swimming, or bicycling. The activity you choose does not have to be strenuous to improve your cardio respiratory endurance. Start slowly with an activity you enjoy, and gradually work up to a more intense pace.
