VO2 max is the maximum rate at which your body can consume oxygen during intense exercise, measured in mL of oxygen per kg of body weight per minute (mL/kg/min). It is the gold standard measure of cardiorespiratory fitness. Higher VO2 max indicates a more efficient cardiovascular and muscular system. It is used by the AHA (American Heart Association), ACSM (American College of Sports Medicine), and cardiac rehabilitation programs worldwide.

Can VO2 max be improved?

Yes. VO2 max is trainable, with most individuals improving 10–25% through aerobic training over 6–12 months. High-intensity interval training (HIIT) is particularly effective for improving VO2 max, as shown in research supported by ACSM, Nordic sports science institutes, and meta-analyses. After age 25, VO2 max naturally declines approximately 1% per year without training, but regular exercise substantially slows this decline.

🇺🇸 AHA / ACSM Norms Cooper Test Rockport Walk Test

VO₂ Max Calculator

Q: What is a good VO2 max?

VO2 max norms vary by age and sex. For men aged 30–39: Poor 50 mL/kg/min. For women aged 30–39: Poor 44 mL/kg/min (AHA/ACSM classification). Elite male distance runners typically have VO2 max of 70–85+ mL/kg/min. Eliud Kipchoge's estimated VO2 max is approximately 92 mL/kg/min.

Estimate your VO₂ max — the most important measure of cardiovascular fitness. Choose from three methods: resting heart rate (no exercise needed), the Rockport 1-mile walk test, or the Cooper 12-minute run test.

Quick Answer

VO₂ max is your peak oxygen uptake in mL/kg/min. Average for a 35-year-old man: ~40–45. Average for a 35-year-old woman: ~33–38. Elite endurance athletes: 65–85+. VO₂ max declines ~1%/year without training. Regular aerobic exercise can improve it 10–25% in 6–12 months. Classification tables used: AHA (American Heart Association) and ACSM (American College of Sports Medicine).

Sex

Age

Estimation Method

Resting Heart Rate (bpm)

VO₂ Max Standards by Country

Country / Authority	Classification System	Notable Context
🇺🇸 USA — AHA / ACSM	Poor / Fair / Good / Excellent (4 tiers by age & sex)	Standard used by US cardiologists; Apple Watch uses same metric
🇬🇧 UK — ACSM / BHF	ACSM tables (same as US) used in cardiac rehab	NHS cardiac programs use VO2 max to guide exercise intensity
🇨🇦 Canada — CSEP	CSEP-PATH fitness assessment includes VO2 max	Canadian Physical Activity Guidelines reference VO2 max for fitness surveillance
🇦🇺 Australia — ESSA	ACSM norms adopted; exercise physiologists use same tables	Heart Foundation Australia uses VO2 max in cardiac rehabilitation
🇩🇪 Germany — DGPR	European cardiac rehab uses VO2 peak (ml/kg/min)	German cardiac guidelines: VO2 peak <14 = heart transplant consideration
🇯🇵 Japan — JCS	VO2 peak used in Japanese cardiac rehabilitation (JCS 2012)	Japan Heart Foundation: low VO2 peak linked to heart failure prognosis
🇳🇴 Norway — NTNU	World leader in VO2 max research (4×4 interval protocol)	Highest average population VO2 max; friluftsliv culture drives activity

VO₂ Max Norms by Age — Men

Category	20–29	30–39	40–49	50–59
Excellent	>52	>50	>47	>43
Good	43–52	42–50	38–47	34–43
Fair	34–42	35–41	30–37	27–33
Poor	<34	<35	<30	<27

Values in mL/kg/min. Source: AHA / ACSM classification tables.

VO₂ Max Norms by Age — Women

Category	20–29	30–39	40–49	50–59
Excellent	>47	>44	>41	>37
Good	38–47	36–44	31–41	28–37
Fair	29–37	28–35	24–30	21–27
Poor	<29	<28	<24	<21

Frequently Asked Questions

What is a good VO2 max for my age? ▾

For men aged 30–39, "Good" VO2 max is 42–50 mL/kg/min; "Excellent" is above 50. For women aged 30–39, "Good" is 36–44; "Excellent" is above 44. These are AHA/ACSM classifications. The Apple Watch "Cardio Fitness" score uses the same VO2 max metric. A low VO2 max (<35 for men, <28 for women) is associated with significantly higher cardiovascular mortality risk.

How do Scandinavian countries use VO2 max differently? ▾

Scandinavian countries (Norway, Sweden, Finland) have some of the highest average VO2 max levels in the world due to high rates of outdoor recreational activity. Norway's concept of "friluftsliv" (outdoor life) is associated with sustained aerobic activity year-round. Norwegian research institutions (NTNU in Trondheim) have been at the forefront of VO2 max research, including developing the "4×4 interval" training protocol proven to raise VO2 max efficiently.