VO2 max is the maximum volume of oxygen your body can use during intense exercise. It's the gold standard measure of cardiorespiratory fitness — and research consistently shows it's one of the strongest predictors of both lifespan and healthspan.
Why VO2 Max Matters
A landmark study published in JAMA found that individuals with low cardiorespiratory fitness had a mortality risk comparable to smoking, diabetes, and heart disease. Improving from "low" to "below average" fitness reduced mortality risk by 50% — more than any medication currently available.
Higher VO2 max means your heart, lungs, and muscles work together more efficiently. You have more energy, recover faster, and your body handles stress — physical and metabolic — better.
What's a Good VO2 Max?
VO2 max is measured in mL/kg/min. General benchmarks for men:
- Excellent: above 55 (ages 20–29)
- Good: 46–55
- Average: 38–45
- Poor: below 38
For women, expected values are roughly 15–20% lower due to differences in body composition and haemoglobin levels.
How to Improve VO2 Max
High-intensity interval training (HIIT) is the most effective method for improving VO2 max. Even 2–3 sessions per week of hard aerobic work — cycling, running, rowing — produces measurable improvements within 4–6 weeks.
