A good VO2 max for a male runner sits above 50 ml/kg/min, and for a female runner above 44 ml/kg/min, once you’re in your twenties and thirties. But that single line hides more than it reveals. Your score only means something when you compare it with people of your age and sex, because VO2 max drops steadily from your thirties onwards, even if you’re fit.
A lot of runners fixate on this number more than their race times, and I get why. It feels scientific and objective, almost like a verdict on your body. It isn’t. It’s an estimate of your aerobic ceiling, or how much oxygen your body can use at full effort. It works alongside other factors, such as running economy and lactate threshold, to determine how fast you actually race.
This piece gives you the age and sex benchmarks, then explains what your number can and can’t tell you.
VO2 Max Scores by Age and Sex for Runners
VO2 max is measured in millilitres of oxygen used per kilogram of body weight per minute (ml/kg/min). Men typically score higher than women at every age, mostly because of differences in body composition and blood haemoglobin levels. Scores also decline for both sexes as the years go by. The tables below give rough bands for runners, not the general population, so don’t panic if you sit below the “superior” line for elite athletes.
Men
| Age | Below Average | Average | Good | Excellent | Superior |
| 20-29 | Below 42 | 42-45 | 46-52 | 53-59 | 60+ |
| 30-39 | Below 39 | 39-43 | 44-50 | 51-56 | 57+ |
| 40-49 | Below 36 | 36-40 | 41-47 | 48-53 | 54+ |
| 50-59 | Below 33 | 33-36 | 37-43 | 44-49 | 50+ |
| 60+ | Below 29 | 29-33 | 34-40 | 41-45 | 46+ |
Women
| Age | Below Average | Average | Good | Excellent | Superior |
| 20-29 | Below 36 | 36-39 | 40-46 | 47-52 | 53+ |
| 30-39 | Below 33 | 33-37 | 38-44 | 45-49 | 50+ |
| 40-49 | Below 30 | 30-34 | 35-41 | 42-46 | 47+ |
| 50-59 | Below 27 | 27-31 | 32-37 | 38-42 | 43+ |
| 60+ | Below 24 | 24-28 | 29-34 | 35-38 | 39+ |
These bands come from a mix of exercise physiology research and lab testing data, some of it dating back a few decades. Older reference groups were often smaller and less diverse than today’s running population, so treat the bands as a useful guide, not a precise ranking. Elite marathon runners regularly post scores above 70, and some elite male distance runners have reached the mid-80s. That says more about genetics and years of training than what you should expect from your own watch.
Your watch estimate deserves a mention, too. Garmin, Apple Watch, and Coros calculate VO2 max from your heart rate, pace, and GPS data during runs. They don’t measure it while you breathe into a mask in a lab. The result is usually a reasonable estimate, often within a few points of a proper lab test, but it can wobble if you mostly run on trails, in the heat, or without a chest strap. Use the number as a trend over several months, not as a scientific reading you’d stake money on.
How to Interpret Your Score and Improve It
Your VO2 max tells you about your aerobic ceiling, the maximum rate at which your body can use oxygen, but it doesn’t tell you how fast you’ll race. Plenty of runners with a modest VO2 max out-race people with higher scores. Running economy, or how efficiently you use oxygen, and lactate threshold, or how long you can hold a hard pace before fatigue sets in, matter just as much.
Think of VO2 max as your engine size. A big engine helps, but a well-tuned, efficient one that sips fuel can still win the race. That’s why two runners with identical VO2 max scores can finish a 10K minutes apart.
A few practical points are worth knowing:
- Genetics set your starting point. Some people are born with a higher ceiling, and no training plan changes that basic fact.
- Training raises your number, usually by 10 to 20 percent over months of consistent work, though gains slow down the longer you’ve been running.
- Age brings a gradual decline from your thirties onwards, roughly 1 percent a year, but staying active noticeably reduces that drop compared with being sedentary.
- Body weight affects your score directly, since it’s measured per kilogram. Losing excess weight can nudge your number up without adding any fitness at all.
To improve your score, the evidence points to high-intensity intervals. Sessions that take you close to your maximum effort, such as 3 to 5 minute efforts at a hard pace with equal recovery jogs, create strong adaptations in your heart and muscles. One session might look like 5 x 4 minutes hard, with 3 minutes of easy jogging between each effort.
Don’t do this every session. For most recreational runners, two hard sessions a week, built around a base of easy running, is enough. It also helps keep injury risk down. Give a new training block 6 to 8 weeks before expecting a meaningful shift in your number.
If your score plateaus, check your easy running pace first. Many runners push their easy days too hard, which blunts recovery and limits the quality of the sessions that actually move the needle.
Conclusion
A good VO2 max depends on your age and sex, so compare your score with the right group instead of relying on one headline figure. Watch estimates are useful for tracking trends over several months, even if they aren’t as accurate as lab testing. Your VO2 max shows your aerobic ceiling, not your finishing time. Running economy and lactate threshold matter just as much when it comes to race speed. Structured intervals, patience, and consistent easy running will improve your number more than watching it ever will.
