Définition
VO2 max is the maximum volume of oxygen your body can consume per minute during maximal exercise. It is the gold-standard measure of aerobic fitness and one of the strongest single predictors of longevity — associated with lower all-cause mortality across every study that has examined it.
VO2 max measures the upper limit of the cardiorespiratory and muscular oxygen transport and utilization system. It is expressed in mL of O2 per kg of body weight per minute. It reflects the integrated capacity of lungs to transfer oxygen to blood, the heart to pump oxygenated blood, and muscles to extract and use that oxygen for ATP production through aerobic metabolism.
The longevity data on VO2 max is among the most consistent in epidemiology. A landmark 2018 JAMA Network Open study of 122,000 patients found that cardiorespiratory fitness (measured by VO2 max) was the strongest predictor of all-cause mortality — stronger than smoking, hypertension, or coronary artery disease. Being in the top 25% of VO2 max for your age was associated with 80% lower mortality risk compared to the bottom 25%.
For women, average VO2 max values decline approximately 10% per decade after age 20 in sedentary individuals. But this decline is largely a function of declining activity level rather than inevitable biology — highly active women in their 50s and 60s regularly match the VO2 max values of sedentary women in their 30s.
The primary driver of VO2 max is stroke volume — how much blood the heart pumps per beat. This is trained most effectively by sustained aerobic exercise at Zone 2 intensity over months, supplemented by higher-intensity intervals (which provide a ceiling-raising stimulus, Norwegian 4x4 being the most studied protocol). Losing excess visceral adiposity also improves VO2 max relative to body mass.
Ava Longevity · Built on the Ava Method · MMXXV