Name one common measure used to assess cardiovascular endurance.

VO2 max is a widely recognized measure of cardiovascular endurance, as it quantifies the maximum amount of oxygen that the body can utilize during intense exercise. This metric reflects the efficiency of the cardiovascular and respiratory systems and indicates how well an individual can sustain aerobic activity. Higher VO2 max values typically correlate with better cardiovascular fitness, allowing individuals to perform more effectively during prolonged physical activities. It is often assessed through controlled exercise testing, such as treadmill or cycle ergometer protocols, where the intensity is progressively increased until maximal effort is reached.

Other measures related to fitness, such as heart rate variability, provide valuable insights into the body's autonomic function and stress levels but are less direct indicators of cardiovascular endurance. Flexibility index and strength endurance, while important components of overall fitness, assess different physical attributes and do not specifically measure the capacity of the cardiovascular system for sustained exercise.