When it comes to measuring fitness, VO₂ max is one of the most widely researched and respected markers in exercise science. It reflects how well your body can deliver and use oxygen during exercise. While it has long been a focus for elite athletes, research shows it is also a critical measure of long-term health and longevity. A higher VO₂ max not only supports peak athletic performance but is also strongly correlated with quality of life and healthy aging. Understanding VO