Key takeaways
VO2max falls roughly 3 to 6% per decade in your 20s and 30s, accelerating to more than 20% per decade after 70
Endurance-trained older adults often have VO2max values like sedentary people decades younger
It is never too late: previously sedentary people in their 60s and 70s make meaningful gains with training
VO2max peaks in your twenties and declines from there. The decline is real — but how fast it happens is, to a large extent, up to you.
How fast does it fall?
The Baltimore Longitudinal Study of Aging retested hundreds of healthy adults over many years. Fleg and colleagues (2005) found the decline is not linear:
- roughly 3–6% per decade in the 20s and 30s,
- accelerating with each decade,
- to more than 20% per decade in the 70s and beyond.
That acceleration matters because everyday life — climbing stairs, carrying shopping, getting up from a chair — needs a minimum level of aerobic capacity. Falling below it means losing independence.
Why it falls
- Maximum heart rate drops by roughly one beat per year, and nothing reverses this.
- Stroke volume and heart compliance decline, especially with inactivity.
- Muscle mass falls (sarcopenia), lowering the oxygen the body can use.
- Activity drops — and a lot of what looks like ageing is actually detraining. See how fast you lose VO2max.
The good news: training shifts the curve
- Endurance-trained older adults typically have VO2max values similar to sedentary people decades younger.
- Masters athletes still decline with age, but from a much higher level, so they stay far above the threshold for independence.
- It is never too late: studies of previously sedentary people in their 60s and 70s show meaningful VO2max gains with supervised training, and the Dallas bed-rest men regained much of their age-related loss in their 50s (what limits VO2max).
What to do at every age
| Age | Focus |
|---|---|
| 20s–30s | Build the base: lots of aerobic volume, learn to run intervals, lift weights |
| 40s–50s | Keep one or two quality sessions a week, protect recovery, keep strength training |
| 60s+ | Regular aerobic activity most days, intervals adapted to you (bike, uphill walking), strength and balance work |
Interval training such as the 4×4 has been studied in older adults and patients, with medical clearance. Strength training protects muscle and bone.
Compare yourself with people your age, not your younger self: see the VO2max chart by age.
Frequently asked questions
At what age does VO2max start to decline?
VO2max peaks in your twenties and declines from there. The decline is slow at first, about 3 to 6% per decade in your 20s and 30s, and speeds up with each decade.
Can you improve VO2max after 60?
Yes. Studies of previously sedentary people in their 60s and 70s show meaningful VO2max gains with supervised training, and interval training has been studied in older adults with medical clearance.
Why does VO2max decrease with age?
Maximum heart rate drops by about one beat per year, stroke volume and muscle mass fall, and activity often drops. Much of what looks like ageing is actually detraining.
Sources
- Fleg JL, et al. Accelerated longitudinal decline of aerobic capacity in healthy older adults. Circulation, 2005.
- McGuire DK, et al. A 30-year follow-up of the Dallas Bedrest and Training Study. Circulation, 2001.