VO2 max measures the maximum amount of oxygen the body can utilize during intense exercise, serving as an indicator of aerobic fitness. High VO2 max levels correlate with improved endurance and cardiovascular health. It reflects the efficiency of the heart, lungs, and muscles in delivering and using oxygen, helping to assess an individual’s fitness level. Regular cardiovascular training can help increase VO2 max, enhancing performance in endurance sports and overall physical activity.