What are the 4 factors of cardiorespiratory fitness?

The four factors of cardiorespiratory fitness are aerobic capacity, which measures the maximum amount of oxygen the body can utilize during intense exercise; endurance, indicating the ability to sustain prolonged physical activity; recovery, reflecting how quickly the heart rate returns to normal after exertion; and efficiency, which assesses how effectively the cardiovascular and respiratory systems deliver oxygen to the muscles. Together, these factors contribute to overall cardiovascular health and performance in physical activities.