If you're between ages 20–29, the median VO2 max is 48.0 ml/kg/min for men and 37.6 ml/kg/min for women. Anything at or above the 60th percentile is "Good" in the ACSM framework; 80th and above is "Excellent."
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Men — ages 20–29
| Age | 5th | 10th | 25th | 50th | 75th | 90th | 95th |
|---|---|---|---|---|---|---|---|
| 20–29 | 29.0 | 32.1 | 40.1 | 48.0 | 55.2 | 61.8 | 66.3 |
Values are VO2 max in ml/kg/min. Source: The Cooper Institute (see /methodology/).
For men in their 20s: below 40.1 ml/kg/min is "Poor-to-Fair"; 48.0 is the median; 55.2 puts you in the top quartile ("Good"); 61.8 is "Excellent" (top 10%); and anything above 66.3 is "Superior" — top 5% of men in this age bracket.
Women — ages 20–29
| Age | 5th | 10th | 25th | 50th | 75th | 90th | 95th |
|---|---|---|---|---|---|---|---|
| 20–29 | 21.7 | 23.9 | 30.5 | 37.6 | 44.7 | 51.3 | 56.0 |
Values are VO2 max in ml/kg/min. Source: The Cooper Institute (see /methodology/).
For women in their 20s: below 30.5 ml/kg/min is "Poor-to-Fair"; 37.6 is the median; 44.7 puts you in the top quartile ("Good"); 51.3 is "Excellent" (top 10%); and anything above 56.0 is "Superior" — top 5% of women in this age bracket.
Training targets for your 20s
If you are below the 40th percentile, structured aerobic training typically yields 10–20% gains in 8–12 weeks — the biggest relative returns are available here. Above the 75th percentile, gains slow to roughly 3–8% per training block, but maintenance becomes the priority: VO2 max loss in trained adults is about half the rate of untrained peers.
- Zone 2 training — 2–3 sessions per week, 45–90 minutes each.
- Norwegian 4x4 intervals — 1 session per week at 85–95% max heart rate.
- Polarized training — the 80/20 rule used by most elite endurance athletes.
Frequently asked questions
- What is an average VO2 max in your 20s?
- The 50th-percentile VO2 max for men in their 20s is 48.0 ml/kg/min. For women, it's 37.6 ml/kg/min.
- What is a good VO2 max in your 20s?
- ACSM classifies the 60th–79th percentile as "Good." For men in their 20s that means roughly 50.9–55.2 ml/kg/min; for women, 40.4–44.7.
- What is considered excellent for ages 20–29?
- The 90th-percentile VO2 max is 61.8 ml/kg/min for men and 51.3 for women in the 20–29 bracket.
- How can I improve my VO2 max in my 20s?
- A combination of zone-2 training 2–3 times per week and high-intensity intervals (Norwegian 4x4 or 30/30 intervals) 1–2 times per week typically produces 5–15% gains over 8–12 weeks. See /improve/ for structured programs.