How Fast Does VO2 Max Drop With Age?

Is a falling VO2 max just part of getting older, or can you change the slope? Here is what studies report about the rate of decline, what training can change, and a 4-week plan to track your own direction.

In this article

1. How fast does VO2 max decline with age?
2. Does VO2 max decline faster as you get older?
3. Why does VO2 max decline with age?
4. Do active people lose VO2 max more slowly?
5. What can training change at any age?
6. Why do wearable VO2 max estimates differ from lab tests?
7. How can you track your VO2 max direction over 4 weeks?
8. When should you see a clinician?
9. Frequently asked questions
10. Final thoughts
11. Sources and further reading

How fast does VO2 max decline with age?

VO2 max declines by around 10% to 16% per decade averaged across adulthood in the studies reviewed here, but the rate is not constant. Reported figures run from about 3% to 6% per decade in the 20s and 30s to more than 20% per decade from the 70s onward. Different designs give different numbers.

The link between fitness and lifespan is covered in why VO2 max is linked to living longer.

Hawkins and Wiswell reviewed the literature in Sports Medicine in 2003 and wrote that evidence supports a 10% per decade decline in men and women, regardless of activity level.

Kaminsky and colleagues used the FRIEND registry of treadmill and cycle tests from apparently healthy adults aged 20 to 89. In their 2022 update, the 50th percentile score fell on average by 13.5% per decade (4.0 mL per kg per minute) on a treadmill and 16.4% (4.3) on a cycle. These are reference values comparing different people, not a record of one person.

Does VO2 max decline faster as you get older?

Yes, in the best longitudinal data available, the rate of VO2 max decline accelerates with each decade. In the Baltimore Longitudinal Study of Aging, the loss grew from 3% to 6% per 10 years in the 20s and 30s to more than 20% per 10 years in the 70s and beyond.

Fleg and colleagues measured peak treadmill oxygen consumption in 375 women and 435 men aged 21 to 87, free of clinical heart disease, over a median follow-up of 7.9 years. Peak VO2 declined in every decade in both sexes, and from the 40s onward the decline was larger in men than in women.

The authors noted that cross-sectional studies may give overly optimistic pictures of ageing, and concluded that the decline accelerates markedly with each decade regardless of activity habits.

Units and methods differ between rows, so compare the pattern, not exact figures.

Why does VO2 max decline with age?

VO2 max declines with age mainly because of lower maximal heart rate and lower lean body mass, according to the Hawkins and Wiswell review, with both central (heart) and peripheral (muscle) changes involved. Exercise training does not change the fall in maximal heart rate, though it can help preserve lean mass.

In Fleg and colleagues' data, oxygen delivered per heartbeat declined in step with peak VO2, while maximal heart rate fell by only 4% to 6% per 10 years.

Because lean mass is part of the story, Hawkins and Wiswell recommended pairing aerobic activity with strength training. Muscle loss is covered in how fast muscle declines with age.

Do active people lose VO2 max more slowly?

Active people generally keep a higher VO2 max, but the evidence on whether they lose it more slowly is mixed. The Baltimore study found similar declines across all quartiles of self-reported activity, while the Hawkins and Wiswell review suggests that long-maintained high-intensity training may reduce loss in some men.

Hawkins and Wiswell reported that high-intensity exercise may reduce the loss by up to 50% in young and middle-aged men, but not older men, if maintained long term. Middle-aged and older women did not appear able to bring their loss below 10% per decade. Maintaining high-intensity training seems limited to about one decade at best.

Tanaka and Seals (2008) reviewed master athletes: peak endurance performance held until about 35, then fell modestly until 50 to 60 and more steeply after, which they linked largely to reduced training intensity and volume.

What can training change at any age?

Training can raise VO2 max in older adults, according to a 2021 meta-analysis of randomized trials, though the comparison in that review was one type of training against another. Regular aerobic activity plus strength work is also what the NHS recommends for adults over 65.

Wu and colleagues pooled randomized trials of high-intensity interval training (HIIT) in older adults. HIIT improved peak oxygen consumption more than moderate-intensity continuous training, with a weighted mean difference of 1.74 (95% CI 0.80 to 2.69). That compares two exercise types, not exercise against doing nothing, and interval work is demanding, so check with a clinician first.

For adults 65 and over, the NHS recommends at least 150 minutes of moderate activity a week (or 75 minutes of vigorous activity if already active), plus strength, balance and flexibility work on at least 2 days. It advises speaking to a GP first if you have not exercised for some time or have medical conditions.

On starting later, is it too late to start exercising at 60 covers the question.

Why do wearable VO2 max estimates differ from lab tests?

Wearable VO2 max numbers differ from lab tests because wearables estimate the value from heart rate, movement and personal details instead of measuring the oxygen you breathe. A 2022 meta-analysis found that group-level accuracy can be reasonable, but the error for an individual is large.

Molina-Garcia and colleagues reviewed 14 validation studies. Wearables whose algorithms used resting information overestimated VO2 max (bias 2.17 mL per kg per minute, limits of agreement -13.07 to 17.41), while exercise-based devices had a bias of -0.09 (limits -9.92 to 9.74). The authors said individual error is large.

A 2026 study compared a Garmin Forerunner 245 with laboratory gas analysis in 35 endurance athletes aged about 25. The watch underestimated VO2 max (average errors of 7.9% and 7.2% across two runs). One brand and a young, fit group do not describe every device.

How can you track your VO2 max direction over 4 weeks?

You can track VO2 max direction over 4 weeks by keeping conditions steady, logging your estimate at the same time each week, and noting how hard you trained. A short window shows little, so treat the plan as the start of a months-long trend. Check with a clinician first if you have a medical condition or are new to exercise.

When should you see a clinician?

See a clinician before starting a new exercise program if you have not been active for some time or have a medical condition, and seek help promptly for chest pain, severe breathlessness or breathlessness that is getting worse. A tracker's VO2 max number cannot diagnose anything.

The NHS advises calling 999 or going to A&E for severe breathing difficulty, a tight or heavy chest, or pain spreading to the arms, back, neck or jaw. It advises seeing a GP if shortness of breath worsens with normal activities or when lying down, or comes with swollen ankles.

People with heart or lung conditions, high blood pressure, diabetes, or who are pregnant should ask a professional about intensity before changing training.

Frequently asked questions

At what age does VO2 max start to decline?

In the Baltimore longitudinal study, peak VO2 declined in every decade from the 20s onward, at about 3% to 6% per 10 years in the 20s and 30s. Cross-sectional reference data show the same downward direction. Individual timing varies with training, health and body composition, so the pattern is an average.

What is a normal VO2 max for my age?

Reference percentiles exist: the FRIEND registry reports values for each decade from 20 to 89, separately for men, women, treadmill and cycle testing. Normal is a range, and your own trend matters more than comparing one number. A clinician or exercise physiologist can place a lab result against those tables.

Can you improve VO2 max after 60?

Randomized trials suggest improvement is possible in older adults. A 2021 meta-analysis found HIIT raised peak oxygen consumption more than moderate continuous training. Those trials were generally small and structured, so check with a clinician before starting hard intervals, and build up gradually under advice if you are new to exercise.

Does VO2 max decline faster in men or women?

In the Baltimore study, the rate of decline from the 40s onward was larger in men than in women. The Hawkins and Wiswell review reported a similar 10% per decade pattern in both sexes and noted women may find it harder to reduce the loss below that. Evidence on mechanisms is limited.

Is my watch or band VO2 max accurate?

It is an estimate. A 2022 meta-analysis of consumer wearables found acceptable group-level accuracy for exercise-based methods but large individual errors, and a 2026 smartwatch study found underestimation in athletes. Use the figure to watch your own direction over months, and rely on a lab test if you need a precise value.

Final thoughts

Here is the short recap.

• VO2 max averages roughly a 10% to 16% fall per decade in the sources reviewed, and the longitudinal data show the loss speeding up in later decades.
• Training can improve fitness in older adults, but the evidence does not show that anyone stops the age trend entirely.
• Wearable VO2 max is an estimate with large individual error, so watch the trend over months and see a clinician about worrying symptoms.

Your turn: Do you track your fitness over time, and what has changed for you across the years? Tell us in the comments.

Sources and further reading

1. Hawkins S, Wiswell R. Rate and mechanism of maximal oxygen consumption decline with aging: implications for exercise training. Sports Medicine, 2003.
2. Fleg JL, Morrell CH, Bos AG, Brant LJ, Talbot LA, Wright JG, Lakatta EG. Accelerated longitudinal decline of aerobic capacity in healthy older adults. Circulation, 2005.
3. Tanaka H, Seals DR. Endurance exercise performance in Masters athletes: age-associated changes and underlying physiological mechanisms. The Journal of Physiology, 2008.
4. Kaminsky LA, Arena R, Myers J, Peterman JE, Bonikowske AR, Harber MP, Medina Inojosa JR, Lavie CJ, Squires RW. Updated Reference Standards for Cardiorespiratory Fitness Measured with Cardiopulmonary Exercise Testing: Data from FRIEND. Mayo Clinic Proceedings, 2022.
5. Wu ZJ, Wang ZY, Gao HE, Zhou XF, Li FH. Impact of high-intensity interval training on cardiorespiratory fitness, body composition, physical fitness, and metabolic parameters in older adults: A meta-analysis of randomized controlled trials. Experimental Gerontology, 2021.
6. Molina-Garcia P, Notbohm HL, Schumann M, et al. Validity of Estimating the Maximal Oxygen Consumption by Consumer Wearables: A Systematic Review with Meta-analysis and Expert Statement of the INTERLIVE Network. Sports Medicine, 2022.
7. Engel FA, Masur L, Sperlich B, Düking P. Validity of VO2max estimates from the Forerunner 245 smartwatch in highly vs. moderately trained endurance athletes. European Journal of Applied Physiology, 2026.
8. NHS. Physical activity guidelines for older adults. nhs.uk, accessed 2026.
9. NHS. Shortness of breath. nhs.uk, accessed 2026.