📊 Am I Normal?
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💪 Fitness

What is my estimated VO2 max?

VO2 max is the single best predictor of cardiovascular longevity — better than blood pressure.

Rate each statement 1 (strongly disagree) to 5 (strongly agree). Your score updates live.

1I can sustain moderate cardio (jogging, cycling) for 30+ minutes without needing to stop.
2I rarely get out of breath climbing several flights of stairs.
3I can hold a conversation during moderate exercise without gasping for air.
4My heart rate returns to normal within 2 minutes after intense exercise.
5I don't feel excessively fatigued the day after a hard workout.
6I recover quickly from sprints or high-intensity intervals.
7I sleep well and wake up feeling rested after exercise days.
8I do structured cardio exercise (running, swimming, cycling) at least 3 times per week.
9I walk or bike for daily errands rather than driving whenever possible.
10I would describe myself as someone who leads a physically active lifestyle overall.

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What is VO2 max and why does it matter?

VO2 max — maximal oxygen uptake — measures the maximum rate at which your body can consume oxygen during intense exercise. Expressed in millilitres of oxygen per kilogram of body weight per minute (mL/kg/min), it is widely regarded as the gold standard for cardiovascular fitness. A landmark 2018 study published in JAMA Network Open by Mandsager et al. found that cardiorespiratory fitness was inversely associated with all-cause mortality with no upper limit of benefit, making VO2 max one of the strongest predictors of longevity — stronger even than smoking, diabetes, or hypertension as individual risk factors.

Average VO2 max by age

VO2 max peaks in the mid-20s and declines approximately 1% per year after age 30 without training intervention. According to the American College of Sports Medicine (ACSM), typical values for untrained adults are:

  • Men 20-29: 38-42 mL/kg/min (average ~42)
  • Men 40-49: 34-38 mL/kg/min (average ~36)
  • Women 20-29: 31-37 mL/kg/min (average ~35)
  • Women 40-49: 27-31 mL/kg/min (average ~29)
  • Elite endurance athletes: 70-85+ mL/kg/min

VO2 max and longevity

Dr. Peter Attia, in his book Outlive (2023), describes VO2 max as the single metric most strongly correlated with all-cause mortality. Moving from the bottom 25th percentile to above the 50th percentile reduces all-cause mortality risk by approximately 50%. The Cleveland Clinic's study of 122,007 patients confirmed that elite fitness (top 2.3%) was associated with an 80% reduction in mortality compared to low fitness.

How to improve VO2 max

  • Zone 2 training: 150-180 minutes per week of steady-state cardio at a conversational pace builds the aerobic base
  • High-intensity interval training (HIIT): 1-2 sessions per week of 4x4 minute intervals at 90-95% max heart rate (the Norwegian 4x4 protocol)
  • Consistency over intensity: Regular moderate exercise improves VO2 max by 15-20% within 8-12 weeks
  • Cross-training: Combining running, cycling, and swimming prevents overuse injuries while maintaining stimulus

Three sub-scales in this quiz

  • Cardio Endurance (items 1-3): Ability to sustain aerobic effort — the core component of VO2 max
  • Recovery Speed (items 4-7): How quickly your cardiovascular system rebounds — faster recovery indicates higher fitness
  • Activity Level (items 8-10): Overall physical activity patterns, which directly predict aerobic capacity

Sources: Mandsager et al. (2018, JAMA Network Open), ACSM Guidelines for Exercise Testing (11th ed.), Attia (2023, Outlive), Ross et al. (2016, VO2 max as clinical vital sign).