Measure: Je VO2max schatten

What It Is

VO2 max is the most oxygen your body can take in, carry and use per minute at full effort. It is scaled to bodyweight in milliliters per kilogram per minute (mL/kg/min). It sums the whole oxygen chain at once: lungs loading oxygen into the blood, heart pumping it out, blood carrying it, muscles pulling it out to burn. In healthy people the ceiling is set mostly by how much blood the heart can move per beat at maximum, its stroke volume. Endurance training enlarges that stroke volume, so it raises the number.

The reference measurement is a graded test to exhaustion on a treadmill or bike while a machine analyzes each breath for oxygen uptake. That laboratory test, needing a mask and a technician, is what every method below is measured against.

How To Estimate It

Every method here trades some accuracy for skipping the laboratory. The five options run from a desk questionnaire to an all-out run, each validated against that lab standard.

The non-exercise questionnaire. The lowest-effort estimate uses no exercise at all. A validated equation takes your sex, age, body size and a rating of your usual activity, and returns a VO2 max number. In validation it reached a multiple correlation near 0.81 with a standard error around 5 mL/kg/min, and it beat the older submaximal step-test prediction. That error is wide, so the equation gives only a rough placement and can track change over time; it is not precise enough for an exact figure. The accuracy of the activity rating you give sets the quality of the answer, and several free online calculators run it.

The Cooper 12-minute run, or the 1.5-mile run. Two classic field tests for people who can run hard safely. In the Cooper test you cover as much distance as you can in 12 minutes; the other times a 1.5-mile effort. Both convert to a VO2 max estimate through a standard formula, because how far you can keep going over that time depends mostly on your aerobic capacity. They are among the more accurate field options for a fit person, and the most demanding of the menu. The estimate depends on a near-maximal effort, and that effort is the risky part if you are older, out of shape, or have a heart condition.

The Rockport one-mile walk. The best option for people who should not run flat out. You walk one mile as briskly as you comfortably can, then feed your time, your finishing heart rate, your age, sex and weight into the Rockport equation. Validated against a treadmill test in adults aged 30 to 69, it estimated VO2 max with a cross-validation correlation around 0.92, strong for a field test. Your finishing heart rate is an input, so anything that shifts it adds error.

The Astrand submaximal step or cycle test. An older approach that estimates VO2 max from your heart rate response to a fixed submaximal workload, on a step or a cycle. It is gentler than a maximal run, and the least accurate method here. The same study gave the non-exercise equation an error near 5 mL/kg/min. It found the Astrand test's error was wider, from about 5.5 up to 9.7. It works for tracking yourself under identical conditions; for a one-off absolute number it is the weakest choice.

Wearables. A watch estimates VO2 max from the relationship between your heart rate and your pace or power during ordinary activity. A research model combining wearable signals with basic biomarkers tracked lab-measured fitness with a correlation around 0.82, and detected change over as long as seven years. Consumer watches differ from that research model and vary by brand and algorithm. The estimate rests on the heart-rate-to-effort relationship, and anything that shifts that relationship adds error. Use a wearable for the direction of change over months; a single day's figure carries too much noise to trust.

What The Number Means

Read your estimate as a percentile for your age and sex. The large mortality studies matched people to others of the same age and sex, then ranked them, because a number excellent at 70 can be ordinary at 30. As a rough orientation, young men often sit in the 35 to 50 range and young women in the 30 to 45 range, both drifting down across the decades. Where you fall against your own age and sex band matters more than the raw value. Published norm tables vary by source and testing method, so use one consistently and watch your own movement within it.

The number matters because of what it predicts about survival.

Across very large populations, higher fitness lines up with lower death from any cause, fewer cardiovascular events, less type 2 diabetes, and less of several cancers.

In one long women's cohort it also tracked less dementia. The relationship runs the full length of the range, with no clear point where more stops helping. VO2 max also declines with age on its own, faster the older you get, so the number is a training target as much as a readout.

The Research & Studies

Everything here is based on the research we have collected and checked, sorted into groups and ordered with the strongest evidence first. Click any claim to open the studies behind it.

Progress Markers

The least fit died at about five times the rate of the fittestStrong

In plain terms

The fittest people lived far longer than the least fit. The least-fit group had about five times the death rate of the fittest, and there was no ceiling where being fitter stopped adding survival.

In detail

A retrospective cohort at a single tertiary medical center. Low versus elite fitness carried an adjusted hazard ratio of 5.04 (95% CI 4.10 to 6.20), against 1.29 for coronary artery disease, 1.41 for smoking and 1.40 for diabetes in the same model. The advantage of elite over merely high fitness held in adults aged 70 and older.

The study · 1

Mandsager 2018, JAMA Netw Open · JAMA Network Open

Each 1-MET fitter, about 15% fewer cardiovascular eventsStrong

In plain terms

Each small step up in fitness was linked to about 15% fewer heart attacks and other cardiovascular events, and the least fit had roughly one and a half times the event rate of the fittest.

In detail

A systematic review and random-effects meta-analysis of observational cohorts of healthy men and women. Fitness was expressed in metabolic equivalents (METs). Per 1-MET higher fitness, all-cause mortality risk fell 13% (RR 0.87) and coronary and cardiovascular events fell 15% (RR 0.85). The dose-response was linear across the fitness range, and people at 7.9 METs or more had substantially lower risk than those below.

The study · 1

Kodama 2009, JAMA · JAMA

Fitter young men had about 42% less lung cancer and less liver and digestive cancerModerate

In plain terms

Fitter young men later developed less of several cancers, about 42% less lung cancer and clearly less liver and digestive cancer. The same study found a small rise in prostate and skin cancer among the fitter, most likely tied to more medical screening and more time outdoors.

In detail

A population-based cohort with register linkage. Fitness was measured by a maximal cycle test at military conscription, and Cox models adjusted for age, conscription year and site, body mass index and parental education. Of the men, 84,117 developed cancer at one or more sites. Most site associations pointed to protection with higher fitness; prostate and malignant skin cancer ran the other way, which the authors read as likely detection and exposure effects, not fitness causing those cancers.

Who this may not transfer to:Measured only in men, at fitness tested in youth. Higher fitness associates with lower overall cancer risk in women in other cohorts, but the site pattern here, especially the prostate signal, is male by definition and does not carry across.

The study · 1

Onerup 2023, Br J Sports Med · British Journal of Sports Medicine

Elke 1 MET fitter, ongeveer 8% lager risico op diabetes type 2Moderate

In plain terms

Fitter people were less likely to develop type 2 diabetes, with each small step up in fitness linked to about 8% lower risk.

In detail

Een meta-analyse van observationele cohorten, waarbij de primaire schatting gecorrigeerd was voor vetverdeling of lichaamsomvang. De dosis-respons was lineair, en de auteurs schatten dat 4% tot 21% van de nieuwe jaarlijkse gevallen onder 45- tot 64-jarigen plausibel voorkomen zou kunnen worden door haalbare, realistische verbeteringen in populatiefitheid.

The study · 1

Tarp 2019, Diabetologia · Diabetologia

Hogere fitheid op middelbare leeftijd, begin van dementie ongeveer 9.5 jaar laterEmerging

In plain terms

Fittere vrouwen op middelbare leeftijd ontwikkelden dementie veel minder vaak en veel later. Bij degenen die een fitnesstest deden, bereikte de hoogfitgroep het begin van dementie ongeveer 9.5 jaar later dan de matigfitgroep.

In detail

Een populatiegebaseerd cohort uit Göteborg. Van 1,462 vrouwen onderzocht in 1968 voltooide een deelsteekproef van 191 een trapsgewijze maximale fietstest, en dementie werd gevolgd tot 2012 met correctie voor sociaaleconomische, leefstijl- en medische confounders. Hoge versus matige fitheid droeg een gecorrigeerde hazard ratio van 0.12 (95%-BI 0.03 tot 0.54); de lage-fitnessschatting (HR 1.41, 95%-BI 0.72 tot 2.79) bereikte geen significantie. De fitnesstestgroep was klein, wat het betrouwbaarheidsinterval verbreedt.

Who this may not transfer to:Measured only in women, and only in the 191-woman fitness-tested subsample. Higher fitness associates with lower dementia risk in mixed-sex cohorts too, but the size of the effect here rests on a small group.

The study · 1

Hörder 2018, Neurology · Neurology

Cardiorespiratory Fitness

Aerobe training verhoogde de VO2max met ongeveer 5 mL/kg/minStrong

In plain terms

Training verhoogt het getal betrouwbaar. Enkele weken tot maanden aerobe training verhoogde de VO2max met ruwweg 5 mL/kg/min, en de mensen die het minst fit begonnen, wonnen het meest.

In detail

Een meta-analyse van gecontroleerde studies bij gezonde volwassenen. Duurtraining produceerde een groot effect tegenover geen-oefening controles (4.9 mL/kg/min, betrouwbaarheidslimieten van ongeveer 1.4) en intervaltraining een iets groter effect (5.5 mL/kg/min, limieten van ongeveer 1.2). Een lagere uitgangsfitheid en langere training voorspelden grotere winsten. De studies liepen bij volwassenen van 18 tot 45 jaar.

How to use it

De winst is het grootst voor de minst fitte mensen, en het hangt af van het zwaar blijven van de zware inspanningen naarmate je fitter wordt, dus blijf de intensiteit in de loop van de tijd verhogen; dezelfde comfortabele dosis herhalen voegt geen fitheid meer toe.

The study · 1

Milanovic 2015, Sports Med · Sports Medicine

Measurement And Diagnosis

De VO2max daalt een paar procent per decennium in het begin, meer dan 20% per decennium na 70Moderate · mixed

In plain terms

De aerobe motor krimpt met de leeftijd, en het krimpt sneller naarmate je ouder wordt, van een paar procent per decennium als je jong bent tot meer dan 20% per decennium na 70.

In detail

Seriële lopende band-piek-VO2-metingen uit de Baltimore Longitudinal Study of Aging, in een gemeenschapscohort gehouden vrij van klinische hartziekte. De daling versnelde over elk opeenvolgend decennium en hield stand bij alle niveaus van zelfgerapporteerde vrijetijdsactiviteit, hoewel actief blijven de hele curve hoger verschuift. De versnellende daling duwt fitheid richting de drempelwaarden die zelfstandige dagelijkse functie later in het leven beperken.

How to use it

Omdat het verlies versnelt met de leeftijd, verschuift het praktische doel in de loop van de tijd van het opbouwen van de motor naar het verdedigen ervan, wat gestage aerobe training plus een beetje harde inspanning doet.

The study · 1

Fleg 2005, Circulation · Circulation

How it works

Een vragenlijst zonder inspanning komt op ruwweg 5 mL/kg/minModerate · mixed

In plain terms

Je kunt je VO2max schatten met alleen een korte vragenlijst: geslacht, leeftijd, lichaamsbouw en hoeveel je beweegt. Voor de meeste mensen komt het uit op ruwweg 5 mL/kg/min van een laboratoriumresultaat.

In detail

Een validatiestudie die de steekproef opdeel in ontwikkelings- en kruisvalidatiegroepen. Twee niet-inspanningsmodellen bereikten een R van 0.78 tot 0.81 met standaardfouten van 5.3 tot 5.6 mL/kg/min, beter dan Astrand submaximale voorspellingen waarvan de fouten 5.5 tot 9.7 liepen. De nauwkeurigheid hield stand bij mannen op bloeddrukmeicatie en mannen met een positief inspannings-ECG. De steekproef was ongeveer 90% mannelijk.

The study · 1

Jackson 1990, Med Sci Sports Exerc · Medicine and Science in Sports and Exercise

De één-mijl-wandelschatting volgt een labtest op r = 0.92Moderate · mixed

In plain terms

Loop een mijl zo stevig als je comfortabel kunt, voer dan je tijd en hartslagfrequentie aan het einde in een formule in, en het schat de VO2max nauwkeurig genoeg om jezelf te volgen. Het past bij mensen die niet op volle kracht kunnen rennen.

In detail

De loopband-VO2max werd gemeten bij 343 volwassenen (165 mannen, 178 vrouwen, gemiddelde VO2max 37.0 mL/kg/min), die elk een mijl zo snel mogelijk minstens twee keer wandelden. De voorspellingsvergelijking gebruikte wandeltijd, hartslag in het vierde kwart, leeftijd, gewicht en geslacht, wat r = 0.93 gaf bij ontwikkeling en r = 0.92 bij kruisvalidatie. Veldschattingen zoals deze en de Cooper 12-minuten- of 1.5-mijl-loop ruilen wat nauwkeurigheid in voor het niet hoeven van een laboratorium.

The study · 1

Kline 1987, Med Sci Sports Exerc · Medicine and Science in Sports and Exercise

A wearable tracks lab fitness at r = 0.82Emerging · mixed

In plain terms

A watch can approximate your VO2max from heart rate and movement, close enough to follow your own trend over months and years. It is a good tracker, not a laboratory measurement.

In detail

A free-living study using wearable signals plus simple biomarkers in a neural-network model, validated against laboratory fitness testing. It reached r = 0.82 (95% CI 0.80 to 0.83) in a holdout sample and detected change over time, including after seven years, outperforming simpler estimation approaches. Consumer devices differ from this research model, and watch estimates vary by brand and algorithm.

The study · 1

Spathis 2022, NPJ Digit Med · npj Digital Medicine

How To Improve It

VO2 max responds to two kinds of work, and both belong in a week. The base is easy aerobic movement you can talk through, and it grows the capillaries, mitochondria and recovery capacity the hard efforts draw on. On top sits a small amount of hard work near your limit, which raises the ceiling. Build the base first, especially if you are older, deconditioned or returning from illness.

The main hard session is the 4x4 interval:

1. Warm up.
2. Work four minutes at a hard effort, around 90 to 95% of your maximum heart rate.
3. Recover about three minutes easy.
4. Repeat for four bouts, then cool down.

One to two of these a week, laid on your easy aerobic days with a day between hard sessions, is the dose the research used. More is not automatically better, since the efforts only pay off if you are recovered enough to hit them. The easy base is covered on our Zone 2 Cardio page, and the full interval approach, including how it changes with age, on VO2max Training.

Go Deeper

• Self-Measures: the wider set of tests you can do at home, what each predicts, and what it does not.
• Zone 2 Cardio: the easy aerobic base most fitness is built on, at the strength the research supports.
• VO2max Training: the full approach to raising the number, including trainability into later life.
• Resistance Training: the strength and muscle aerobic work leaves largely untouched, and the other half of aging well.

Cautions For This Practice

Everything to be aware of is here, in one place. This practice suits most healthy people; a few situations call for real care.

8 adverse events and no deaths in 5,060 supervised maximal tests

A single-center retrospective review of maximal cardiopulmonary exercise testing in a heterogeneous high-risk cardiac population, including heart failure, hypertrophic cardiomyopathy, pulmonary hypertension and aortic stenosis, with a quarter of patients severely limited. Eight adverse events occurred (0.16%), six of them sustained ventricular tachycardia, and there were no fatal events. The reassuring rate comes from monitored testing with staff and equipment ready to respond. A maximal effort is where care matters most if you have heart disease, exertional symptoms, or have been sedentary, which is why getting checked first is sensible.Skalski 2012, Circulation

Clear a hard maximal test with a clinician if you are higher-risk

A near-maximal effort pushes the heart to its ceiling, so clear it first if you have known heart disease, an uncontrolled arrhythmia, or uncontrolled high blood pressure. Clear it too for warning symptoms: chest pain or tightness on exertion, unusual breathlessness, palpitations, or fainting when you exert yourself. None of these is an automatic no. Choose the walk test or a wearable estimate instead, and get assessed before testing your limit.

Stop the test for warning symptoms

Whichever method you use, stop straight away for chest pain or pressure, sudden or unusual breathlessness, dizziness or faintness, or a fast or irregular heartbeat, and seek medical advice. A fitness estimate is not worth pushing through a symptom to get.

Estimates are approximate

Every field and wearable method here carries several points of spread, from around 5 mL/kg/min for the better ones to wider for the submaximal step test. Read your result as a band a few points wide, keep the method and conditions consistent, and trust the trend over any single reading. A heart rate altered by beta blockers, caffeine or an irregular rhythm distorts the walk-test and wearable estimates in particular.

Start slow, be smart, read the research, and consult a professional if you have any concerns. This is here to inform your choice, not make it for you.

Common Questions

Can I estimate my VO2 max without a lab?

Yes, closely enough to be useful. A non-exercise questionnaire from your age, sex, body size and activity lands within a few points of a laboratory result for most people. A timed run or the Rockport one-mile walk does a little better, and a wearable tracks your fitness over years. None matches a graded lab test with a breathing mask, the gold standard. Each can still rank you within your age and sex group and show whether your training is working.

Which estimation method should I use?

Match it to your fitness and your health. If you can run hard safely, the Cooper 12-minute or a 1.5-mile time trial is one of the most accurate field tests. If you should not run all-out, the Rockport one-mile walk is the best choice and nearly as accurate. For the lowest effort, the non-exercise questionnaire gives a rough starting point. A wearable will track your trend month to month. Whatever you pick, run it under the same conditions each time so your comparisons stay fair.

How much does VO2 max predict?

A great deal, consistently. In 122,007 adults the least fit had about five times the death rate of the fittest. That gap is larger than heart disease, smoking or diabetes, with no ceiling where more fitness stopped helping. Pooled cohorts link each small step up in fitness to roughly 15% fewer cardiovascular events and 8% lower risk of type 2 diabetes. A million-man cohort tied higher youth fitness to less of several cancers. These come from watching large groups over time; no trial raised people's fitness and then measured the payoff. They are powerful associations with a plausible mechanism, and the training response itself is trial-tested.

How fast can I raise it, and does age stop me?

Meaningfully, and age does not stop you. Across 28 controlled trials in adults, aerobic training raised VO2 max by roughly 5 mL/kg/min against controls, with the biggest gains in those who started least fit. Older adults raise it too, from a lower base and more slowly. Since the number falls faster with each decade left alone, training in later life is partly about holding on to the capacity you have. Retest with the same method every couple of months to see the change.