What Is a Good VO2 Max for a 50 Year Old?

Reference VO2 max percentiles for men and women aged 50 to 59, how to read a reading against them, how far wearable estimates can move it, and what the evidence links to changing it.

For a man in his 50s, the median VO2 max is 32.6 ml/kg/min. 39.7 reaches the 75th percentile, which ACSM labels Good, and 45.6 the 90th, labelled Excellent. For a woman in her 50s the median is 23.4, with 27.6 at the 75th percentile and 32.0 at the 90th. These are the American College of Sports Medicine reference values from maximal treadmill tests with direct gas analysis. Read them with two caveats. Healthy 50-year-old women in a Swedish study reached well above what commonly used reference equations predicted for them, so the standard for women may be set low. And watch estimates have missed lab values by more than the width of a percentile band.

The full VO2 max percentile table for your 50s

Every published breakpoint for the 50 to 59 band. A number between two rows sits between those two percentiles.

How the 50s compare with the 40s and 60s

The median for men steps from 37.8 in the 40s to 32.6 in the 50s and 28.2 in the 60s, and for women from 26.7 to 23.4 and then 20.0. A man who reads 37.8 at 52 is at the median for a man ten years younger and between the 50th and 75th percentile for his own age.

The largest US dataset puts the average fall at 13.5 percent per decade on treadmill tests, about 4.0 ml/kg/min, across 22,379 tests (Mayo Clinic Proceedings, 2022). A Dutch study of 611 adults aged 55 to 75 measured the decline in absolute oxygen uptake at about 1.3 percent a year in women and 2.5 percent a year in men, on cycle tests (European Journal of Applied Physiology, 2026). Cycle tests read lower than treadmill tests in the US data, so a number from a bike test is not directly comparable with a treadmill table. The VO2 max by age page shows every decade.

Reference values may understate women at 50

In 181 healthy 50-year-olds in Sweden, every commonly used reference equation underestimated peak oxygen uptake in women. On one widely used set, women reached 128 percent of their predicted value while men reached 104 percent (Clinical Physiology and Functional Imaging, 2018).

That study tested prediction equations rather than the ACSM percentile table, and one Swedish cohort is not every population. But it points one way: where a reference understates what healthy women actually reach, a woman read against it looks further up the ladder than she would against her real peers. The newer US reference standards were also updated specifically to be more representative of the population than the originals (Mayo Clinic Proceedings, 2022).

What a watch can do to your row in your 50s

For a woman in her 50s, the whole middle half of the table, from the 25th percentile (19.9) to the 75th (27.6), is 7.7 points wide. For a man it runs from 27.1 to 39.7. Published watch errors are a large share of those widths.

Apple Watch underestimated VO2 max by 6.07 ml/kg/min on average in 30 people, a 13.31 percent mean absolute error (PLOS One, 2025). Google Pixel Watch 3 was unbiased on average in 34 people, but individual readings ran from 12.56 below the lab value to 11.50 above it (PLOS One, 2026). Garmin's fēnix 6 reached a 7.05 percent mean absolute error in 19 people (Sensors, 2025). Our VO2 max desk rates wearable VO2 max accuracy as Emerging. A watch reading is a reasonable signal of direction over months and a weak basis for a precise percentile. How wearables estimate VO2 max explains why.

Why the bottom quarter is the row that matters most

In 122,007 adults referred for treadmill testing, whose average age was 53, lower fitness for age and sex was associated with higher mortality across the whole range. Below the 25th percentile carried an adjusted hazard ratio of 5.04 against the fittest group, and below average against above average carried 1.41, the same figure as smoking in the same analysis (JAMA Network Open, 2018). Fitness there was estimated from treadmill workload in a referred clinical population, and the result is an association. Our desk rates the fitness and mortality link Established. See VO2 max and longevity.

What moves the number in your 50s

In 38 randomised trials of middle-aged and older adults, 1,682 people in total, aerobic training raised VO2 max by 1.80 ml/kg/min more than resistance training, and resistance training did more for lean body mass (Archives of Gerontology and Geriatrics, 2024). Our desk rates that comparison Emerging and rates aerobic training's effect on VO2 max Established. Whether interval training beats steady training for the same goal is not settled, which HIIT versus steady-state cardio covers.

Common questions