VO2 Max Estimator

VO2 max (maximal oxygen uptake) is the maximum rate at which your body can consume oxygen during intense exercise, measured in milliliters of oxygen per kilogram of body weight per minute (ml/kg/min). It reflects the combined efficiency of your heart, lungs, blood vessels, and muscles to transport and use oxygen.

A landmark 2018 study by Mandsager et al. in JAMA Network Open found that cardiorespiratory fitness (VO2 max) is the single strongest predictor of all-cause mortality -- stronger than smoking, diabetes, or heart disease. Moving from low fitness to above-average fitness cuts mortality risk roughly in half. Dr. Peter Attia considers VO2 max the most important metric for healthspan and lifespan.

These submaximal tests estimate VO2 max with varying degrees of accuracy. The Cooper 12-min run test correlates at r=0.90 with lab-measured VO2 max. The Rockport walk test is best for untrained or older individuals (r=0.88). Race-based estimates via VDOT are highly reliable for trained runners. The gold standard is a graded exercise test (GXT) in a clinical lab with gas exchange analysis.

It depends on your age and sex. As a general rule: 35-40 ml/kg/min is average for a 30-year-old male, while 45+ puts you in the top 25%. For females, average is around 30-35 and top 25% is 37+. For longevity, Peter Attia recommends targeting the 75th percentile for your age -- or the 75th percentile for people 10 years younger as a stretch goal.

Yes. While VO2 max naturally declines 5-10% per decade after age 30, training can dramatically slow or even reverse this decline. Studies show that previously sedentary adults can improve VO2 max by 15-20% in the first 2-3 months of consistent training. The Norwegian 4x4 interval protocol has been shown to improve VO2 max by 5-10% in 8-12 weeks even in trained individuals.

Re-test every 8-12 weeks to track progress. Use the same test method each time for consistency. For the most reliable trend data, test under similar conditions (time of day, nutrition, rest status). A clinical lab test once per year provides the most accurate baseline.