VO₂ max by age: chart, calculator, and what’s a good score?

What your VO2 max number means

VO2 max is the maximum amount of oxygen your body can use during hard exercise. It is measured in milliliters of oxygen per kilogram of body weight per minute, or mL/kg/min. In plain English, it reflects how well your heart, lungs, blood, and muscles work together.

The number becomes useful only when you put it in context. Age, sex, training background, body size, health, and measurement method all affect the result. A value that is average for a man in his 20s may be well above average for a man in his 60s. That is why the chart and calculator on this page compare you with an age- and sex-specific reference group.

The labels used here are percentile descriptions:

• Poor: below the 25th percentile.
• Fair: 25th to 49th percentile.
• Good: 50th to 74th percentile.
• Optimal: 75th to 89th percentile.
• Excellent: 90th percentile or higher.

These are comparison labels, not diagnoses. A higher result is generally favorable, but your trend and your ability to train consistently matter more than a single category.

Why VO2 max matters for health

Cardiorespiratory fitness is one of the strongest measurable predictors of long-term health. Higher fitness is associated with lower all-cause mortality and fewer cardiovascular events, even after accounting for many traditional risk factors.[1][2][3]

The largest health gain often appears between the least-fit group and the next group up. That is the practical message: you do not need an athlete's VO2 max to benefit. If your result is low, a sustainable improvement may matter more than moving an already high score a little higher.

Population associations do not predict exactly how much one person's risk will change. VO2 max is a useful fitness marker, not a cardiovascular risk calculator or a substitute for blood pressure, cholesterol, glucose, nicotine exposure, sleep, and other health factors.

How to read your result

Use the age chart for orientation, then ask three questions:

1. How was it measured? A laboratory CPET measures oxygen use directly. A field test or wearable estimates it.
2. Is the trend repeatable? Compare results from the same method under similar conditions.
3. What action follows? If you are below average, gradual aerobic training usually offers more value than worrying about the label. If you are already above average, consistency and recovery become the priority.

Field tests and wearables can differ from a laboratory measurement by several mL/kg/min for one person. A watch change from 38 to 39 may be noise. A sustained change of roughly 3.5 mL/kg/min—about 1 MET—over a consistent 8- to 12-week block is more convincing.[6][7]

Laboratory tests, field tests, and wearables

The gold-standard VO2 max test is a cardiopulmonary exercise test, or CPET. You exercise while a mask and gas-analysis system directly measure oxygen consumption and carbon-dioxide production. This is the most precise option and can provide clinical information beyond one VO2 max value.

Field tests are more accessible. The calculator on this page includes the Cooper 12-minute test, 1.5-mile run, Rockport one-mile walk, and 20 m shuttle. Each uses performance data in a published equation to estimate VO2 max. Use the protocol you actually performed; the equations are not interchangeable.[8]

Wearables such as Apple Watch and Garmin estimate VO2 max from heart rate, pace, age, sex, weight, and proprietary algorithms. Exercise-based algorithms tend to perform better than resting-only estimates, but individual error remains meaningful.[6] A wearable is best used as a repeatable trend tool.

Read the field-test guide before choosing a protocol, or see the detailed guide to wearable VO2 max accuracy.

How to improve VO2 max

VO2 max is trainable at many ages. The most durable approach combines enough comfortable aerobic work to build volume with some harder work that challenges oxygen delivery and use.

A practical weekly structure might include:

• Two or three easy-to-moderate aerobic sessions: brisk walking, jogging, cycling, swimming, rowing, or hiking for 30–60 minutes.
• One harder interval session: for example, four 4-minute efforts with easy recovery, adjusted to your fitness and health.
• One or two strength or mobility sessions: these support durability and help you keep training.
• Enough recovery to repeat the week: sleep and easy days are part of the program.

High-intensity interval training can improve VO2 max efficiently, but the best real-world plan usually blends intensity with easier training rather than turning every workout into a test.[9] Use the full guide to improving VO2 max for a structured progression.

When to talk with your clinician

Talk with your clinician before vigorous or maximal testing if you have known heart or lung disease, exertional chest pressure, fainting, uncontrolled blood pressure, significant diabetes complications, or other reasons exercise may be unsafe. Stop a test for chest pain, faintness, severe or unusual shortness of breath, or concerning symptoms.

How this fits Vital8

Life's Essential 8 measures physical activity in minutes. Vital8 keeps that foundation and adds a second lens: what cardiorespiratory fitness did those minutes build?

Two people can meet the same weekly activity target and have different aerobic capacity. VO2 max makes that difference visible, but it remains optional context and does not change the base Vital8 score. See the Vital8 score to place fitness alongside nutrition, nicotine, sleep, weight, cholesterol, blood sugar, and blood pressure.

This page is educational and is not a diagnosis, treatment plan, or substitute for medical care.

References

1. Ross R, Blair SN, Arena R, et al. Importance of assessing cardiorespiratory fitness in clinical practice: a case for fitness as a clinical vital sign. Circulation. 2016.
2. Kodama S, Saito K, Tanaka S, et al. Cardiorespiratory fitness as a quantitative predictor of all-cause mortality and cardiovascular events in healthy men and women. JAMA. 2009.
3. Kokkinos P, Faselis C, Samuel IBH, et al. Cardiorespiratory fitness and mortality risk across the spectra of age, race, and sex. Journal of the American College of Cardiology. 2022.
4. Myers J, Kaminsky LA, Lima R, et al. A reference equation for normal standards for VO2 max: analysis from the FRIEND Registry. Progress in Cardiovascular Diseases. 2017.
5. Loe H, Rognmo O, Saltin B, Wisloff U. Aerobic capacity reference data in 3816 healthy men and women 20–90 years. PLOS ONE. 2013.
6. Molina-Garcia P, Notbohm HL, Schumann M, et al. Validity of estimating maximal oxygen consumption by consumer wearables: a systematic review and meta-analysis. Sports Medicine. 2022.
7. Petek BJ, Al-Alusi MA, Moulson N, et al. Consumer wearable health and fitness technology in cardiovascular medicine. Journal of the American College of Cardiology. 2023.
8. Mayorga-Vega D, Bocanegra-Parrilla R, Ornelas M, Viciana J. Criterion-related validity of distance- and time-based walk/run field tests for estimating cardiorespiratory fitness. PLOS ONE. 2016.
9. Milanovic Z, Sporis G, Weston M. Effectiveness of high-intensity interval training and continuous endurance training for VO2max improvements. Sports Medicine. 2015.