VO2 Max and Longevity: Training Your Aerobic Ceiling

The aerobic fitness metric that predicts how long — and how well — you live

How does VO2 max predict longevity, and how do you actually improve it?

VO2 max — the maximum rate at which your body can consume oxygen during exercise — is among the strongest known predictors of all-cause mortality, with a larger effect size than most cardiovascular risk factors. Peter Attia argues it deserves more attention than almost any other health metric. It can be meaningfully improved at any age through a combination of high-intensity intervals and high-volume aerobic base training, even in previously sedentary individuals.

VO2 max is not just an athlete’s number. Landmark studies have shown that going from the bottom fitness quintile to the second-lowest produces a larger mortality risk reduction than eliminating smoking, managing blood pressure, or treating diabetes. Peter Attia’s Outlive framework centers VO2 max as the single most improvable predictor of healthspan. The practices below explain how to measure it, build it, and protect it as you age — with honest evidence at each step.