You've probably seen the question appear after a run, a gym assessment or a smartwatch update: what is a good VO2 max? Perhaps your watch reports a number that seems encouraging, while a friend of a similar age has a different score and calls theirs “average”. You compare the figures, but neither of you knows whether the difference reflects fitness, age, sex, body weight or the way the device estimated the result.
That confusion is understandable. “Good” isn't a universal VO2 max number. It's a comparison against an appropriate reference group, interpreted alongside your goals and the method used to measure it. A result that looks strong for one adult might be ordinary for another, even when the numbers are close.
This guide builds the answer from the ground up. You'll learn what VO2 max measures, how UK-facing reference ranges are organised, why everyday health and competitive performance require different standards, and how laboratory testing differs from wearable estimates. You'll also see why tracking improvement may be more useful than chasing a label, and how performance benchmarking can help place an individual result in a broader context.
Table of Contents
- Introduction What Good Really Means for Your Fitness
- Understanding What VO2 Max Measures and Why It Matters
- What Counts as Good VO2 Max by Age and Sex
- How Good Looks Different for Everyday Health and Elite Performance
- Why Improving VO2 Max Matters for Longevity and Daily Performance
- How VO2 Max Is Tested From Lab Gold Standard to Field Estimates
- Turning Your Result Into Action With Telomyx VO2 Max Testing
Introduction What Good Really Means for Your Fitness
Consider two adults finishing the same type of training session. One is in their twenties and receives a wearable estimate in the mid-thirties. The other is in their thirties and receives a result in the low forties. They compare screens and assume the higher score must mean better fitness.
That conclusion may be wrong. VO2 max is affected by age, sex, body weight, training status and test protocol, so a comparison only makes sense when those factors are considered together. Even two estimates from different devices may not be directly interchangeable, because each system can use its own algorithm and assumptions.
A useful starting point is to separate three questions:
- Where do I sit compared with similar people? This is the population-norm question.
- Is my fitness sufficient for my life and goals? This is the health and performance question.
- Can I improve from my current baseline? This is the progression question.
Published reference values illustrate why a single target can mislead. Age, sex, test mode, protocol and the population used to construct the reference all affect interpretation. A commonly circulated UK-facing normative guidance page reproduces several older tables that use different categories and cut-offs, so its labels should not be treated as a clinical standard.
The practical answer: a good VO2 max is one that's interpreted against the right comparison group and used to guide a sensible next step.
The rest of the answer depends on how accurately your score was measured. A laboratory result based on expired gases provides a different level of information from a watch estimate, so the benchmark should match the method. Your training aim matters too. A score that supports comfortable daily activity may be entirely adequate for health, but not enough for a competitive endurance event.
Understanding What VO2 Max Measures and Why It Matters
Think of your body as an engine. During exercise, your muscles need fuel, and oxygen helps them release energy from that fuel. Your lungs bring oxygen into the body, your blood transports it, your heart circulates it, and your muscles extract and use it.
VO2 max is the greatest rate at which your body can take in, transport and use oxygen during intense exercise. The result is usually expressed as millilitres of oxygen per kilogram of body weight per minute, written as ml/kg/min. The “relative” format matters because body weight is included in the calculation.
The measure therefore reflects a chain rather than one isolated organ:
- Oxygen intake: your breathing system brings oxygen from the air into your blood.
- Oxygen transport: your heart and circulation deliver oxygenated blood to working muscles.
- Oxygen utilisation: your muscles remove oxygen from the blood and use it to support movement.
A higher value generally means your aerobic system can support more sustained work before fatigue limits you. That can translate into stronger endurance, easier recovery between efforts and greater capacity for activities such as running, cycling, rowing or brisk walking. It doesn't mean every high-scoring person will automatically outperform someone with a lower score, because technique, strength, pacing, motivation and event-specific training also influence performance.
Why the unit can confuse people
The same absolute amount of oxygen can produce different relative scores when body weight changes. This is why VO2 max is reported relative to kilograms rather than as a total volume. A wearable's score is usually an estimate of this relative value, while a laboratory assessment can measure gas exchange during a graded exercise test.
The NHS doesn't set one universal VO2 max target for adults. Instead, its guidance recommends that adults aged 19–64 complete at least 150 minutes of moderate-intensity activity each week or 75 minutes of vigorous-intensity activity within its physical-activity guidance. VO2 max helps quantify the cardiorespiratory fitness associated with that activity, but it shouldn't replace broader movement guidance.
If you want a directly measured result, a VO2 Max Test uses graded exercise with metabolic gas analysis to measure peak oxygen uptake. The result is described as VO2 max when accepted verification criteria are met; otherwise, VO2 peak is the more accurate term. The test can also provide information about aerobic capacity and individual training zones, which makes the result more useful than a standalone score.
A short visual explanation can help you see how the oxygen pathway works in practice.
What Counts as Good VO2 Max by Age and Sex
The most useful benchmark is not “good for everyone”. It's good for people of a similar age and sex, measured and classified in a comparable way. UK-facing normative tables show that the bands vary substantially, which is why a score should never be judged without context.
The international FRIEND analysis combined 11,678 directly measured maximal treadmill tests with 32,329 tests from seven published cohorts. Its results are reference distributions, not medical thresholds or universal targets. The values below are verified 50th-percentile reference points from the published analysis, rather than subjective “good” bands.
| Age group | Men, 50th percentile ml/kg/min | Women, 50th percentile ml/kg/min | Interpretation note |
|---|---|---|---|
| 20–29 | 49.5 | 40.6 | The median differs by sex in this directly measured treadmill dataset. |
| 70–79 | 30.8 | 25.0 | The median declined across age groups; the average decline was about 9% per decade. |
These values come from the peer-reviewed FRIEND international reference analysis. Intermediate age groups follow the same overall downward pattern, but an individual should be compared with the full distribution for the matching decade, sex and testing mode. Reference tables can use different construction methods and classifications, so readers need to understand what population and protocol sit behind a range.
A separate UK discussion of normative data highlights the lack of a dedicated national VO2 max reference standard and warns that inherited or mixed cut-offs can classify the same absolute result differently when comparing available tables. This is one reason you may see conflicting answers online to the same question.
How to use a range responsibly
Start by checking whether the table matches your age and sex. Then check whether the result was directly measured or estimated. Finally, ask whether the table is being used for general population comparison, recreational sport or high-level performance.
Avoid treating the edge of a band as a pass-or-fail line. A result just below a “good” range isn't a diagnosis, and a result just inside it doesn't guarantee strong endurance for every activity. The more useful interpretation is directional: where are you now, how does that compare with a relevant peer group, and would improving your aerobic capacity support something you care about?
Use the table as a map, not a verdict. It gives your number a reference point, but your goals and testing method determine what the result means in practice.
How Good Looks Different for Everyday Health and Elite Performance
A “good” VO2 max depends on the job you want your cardiovascular system to perform. A health-conscious adult may want enough aerobic capacity to climb stairs, walk briskly, carry shopping and remain active without excessive fatigue. A recreational runner may want to hold a faster pace. An elite endurance athlete is trying to gain an advantage over competitors who are already highly trained.
Those are different standards, even though they use the same measurement.
For everyday health
For a health-focused adult, “good” usually means adequate aerobic reserve for daily life and regular activity. You don't need an elite score to benefit from improving cardiorespiratory fitness. The relevant questions are whether you can perform normal tasks comfortably, recover from exertion and maintain an active routine.
A person who walks, cycles for transport or attends mixed gym sessions may gain more from consistent training and improved energy than from moving into a particular performance category. Their benchmark should support independence, enjoyment and long-term resilience.
For recreational runners and cyclists
Recreational athletes often use VO2 max as one piece of a performance picture. A higher score can support faster running or cycling, but it won't determine race results by itself. Running economy, cycling efficiency, muscular endurance, pacing and event-specific preparation can all separate two athletes with similar aerobic capacity.
For this group, “good” may mean above average for age and sex, combined with the ability to sustain the desired pace. A runner preparing for a short, intense event may prioritise high-intensity capacity, while someone preparing for a long-distance event may focus on endurance and pacing.
HYROX athletes sit somewhere between pure endurance and mixed conditioning. They need aerobic capacity, but also strength, repeated high-effort tolerance and the ability to recover while moving between stations. A VO2 max result can inform the aerobic side of the plan without becoming the sole definition of readiness.
For elite endurance performance
Elite endurance athletes operate against a much higher competitive standard, but no single threshold defines elite status. Typical values differ by sex, sport, event, exercise mode and testing protocol. An elite-performance comparison should never be used as a general health target or to judge an ordinary adult's health or worth.
At this level, small differences may matter because the athlete's other qualities are already developed. Coaches may combine VO2 max with lactate responses, training load, economy, power or pace data and recovery markers.
The same number can therefore have different meanings. For one person it signals useful health capacity; for another it identifies a performance ceiling they're trying to raise. The right question is not “Is this high?” but “High enough for what?”
Why Improving VO2 Max Matters for Longevity and Daily Performance
A single classification can hide the most actionable information: your direction of travel. Someone outside a “good” population band may still gain meaningful value from improving their cardiorespiratory fitness, while someone already in the band may benefit from maintaining it rather than endlessly chasing a higher score.
UK Biobank analyses provide a useful way to reframe the issue. In those analyses, each 1-metabolic equivalent higher cardiorespiratory fitness was associated with an 8% lower all-cause mortality risk and a 9% lower cardiovascular mortality risk in the published UK Biobank analysis. These findings describe an association, not a guarantee for an individual, but they show why fitness should be considered as a continuous health marker rather than a simple good-or-bad category.
What a fitter aerobic system can change
Improved aerobic capacity can give you more room between ordinary exertion and exhaustion. You may notice that brisk walking feels easier, you recover more quickly after a hard interval or you can sustain activity without the same level of breathlessness.
It can also make training more productive. When your cardiovascular system delivers and uses oxygen efficiently, you have a stronger foundation for endurance work and repeated efforts. That doesn't remove the need for strength, mobility, sleep or appropriate nutrition, but it can support each part of an active lifestyle.
The longevity perspective changes the target. Rather than asking whether your score has crossed a particular boundary, ask whether your current training is gradually improving your capacity or helping you preserve it. This is especially relevant when age, illness, injury or a long period of inactivity has changed your starting point.
A modest improvement from your baseline can be more meaningful than a flattering label on a table.
Your result should still be interpreted carefully. A change on a wearable may reflect different routes, weather, heart-rate data or algorithm updates rather than a true physiological change. Consistent testing conditions make trends more useful, and direct measurement can clarify whether the change reflects actual aerobic adaptation.
How VO2 Max Is Tested From Lab Gold Standard to Field Estimates
Testing method determines how much confidence you should place in the number. A laboratory assessment measures gas exchange while you exercise at progressively higher intensities. A watch or field test estimates VO2 max from indirect signals, such as heart rate and exercise performance.
Direct measurement in a laboratory
During a graded laboratory test, you'll usually run on a treadmill or cycle on an ergometer while wearing equipment that analyses inhaled and exhaled gases. The workload rises in stages until you reach a maximal effort or the test team has a safe reason to stop. A highest observed value is VO2 peak; calling it VO2 max requires appropriate verification criteria, such as a plateau in oxygen uptake despite increasing workload.
This approach measures respiratory gas exchange directly rather than inferring oxygen uptake from a formula. The protocol, equipment calibration, exercise mode, encouragement, health status and effort all influence the result, so the test should be supervised and interpreted by appropriately trained professionals. Maximal testing should not proceed in people with contraindications such as a recent myocardial infarction, unstable angina, uncontrolled arrhythmia, severe symptomatic aortic stenosis, decompensated heart failure or an acute pulmonary embolism. Anyone with cardiovascular symptoms or a relevant medical history should obtain clearance from their GP or cardiologist before testing.
You can find a broader explanation of how cardiovascular assessments differ in this guide to cardiovascular fitness testing. The important point is that a laboratory result gives you a controlled benchmark, but it still represents your performance under a particular protocol on a particular day.
Wearables and field estimates
A consumer device may use your age, heart-rate response, pace, movement data and previous sessions to estimate VO2 max. That makes regular tracking convenient, but the number isn't a direct gas-analysis measurement. Sensor fit, heart-rate accuracy, terrain, temperature, fatigue and the type of exercise can affect the estimate.
A field test can offer a useful approximation when conditions are standardised and the protocol is repeated consistently. It's most helpful for following broad trends rather than treating one reading as a clinical truth. For a practical explanation of how these estimates work and what can influence them, read this wearable VO₂ max guide.
Choosing the right method
Use a wearable estimate for convenient ongoing feedback. Choose a directly measured assessment when you need a more precise baseline, want personalised training zones or are trying to resolve conflicting readings.
The ANALYSE Longevity Test Bundle includes one VO2 Max test and one DEXA scan. You choose the first appointment during checkout, and any remaining test credit is available through your personal package page. The DEXA exposure still requires a permitted medical purpose and individual justification.
Turning Your Result Into Action With Telomyx VO2 Max Testing
A VO2 max number becomes useful when it changes what you do next. A directly measured assessment can provide a controlled measure of peak or maximal oxygen uptake, depending on the verification criteria, alongside personalised training zones.
That information helps separate easy endurance work from sessions that should feel demanding. It can also give runners, cyclists, HYROX athletes and health-focused adults a more defensible baseline for tracking progress over time.
Telomyx delivers VO2 Max testing through mobile clinics across the North West, using graded exercise with metabolic gas analysis. You receive a provisional VO2 Max score and some key data points before leaving, while the full interpretation and your detailed personal report follow within 2 working days. The service is designed to provide an objective benchmark that can support endurance training, performance planning and longevity-focused decisions.
The result can sit alongside other assessments when you need a broader view of health and performance. DEXA can describe body composition, fat, lean mass and bone density, while RMR testing can quantify energy expenditure at rest. Together, these measurements answer different questions, rather than forcing one score to explain your entire physiology.
UK regulatory note: DEXA may currently be used only for permitted medical purposes, with each exposure individually justified. The UK government position published 30 March 2026 states that non-medical DEXA for sports performance, fitness profiling or general body composition is prohibited.
Before booking, consider what you want the test to resolve. You might want to verify a wearable estimate, establish training zones, understand a plateau or create a baseline for future comparison. More detail about the decision process is available in whether VO2 max testing is worth it.
The content in this article is for educational purposes only and does not constitute medical or dietary advice. If you have an underlying health condition, are taking medication, or are considering significant changes to your diet or exercise regimen, consult a qualified healthcare professional before making any adjustments.
Telomyx provides mobile VO2 Max testing across the North West, with results that connect aerobic capacity to personalised training zones and practical goals. Visit Telomyx to explore the testing options and turn your VO2 max result into a clearer plan for fitness, performance and long-term health.
