What Is VO2 Max?
VO2 max is the maximum rate at which the body can take in and use oxygen during intense exercise, usually expressed in milliliters of oxygen per kilogram of body weight per minute (mL/kg/min). It is widely used as a measure of cardiorespiratory, or aerobic, fitness.
How It Is Measured
The most accurate method is a graded exercise test in a laboratory with gas analysis. Fitness watches and field tests provide estimates.
What Affects It
VO2 max depends on genetics, age, sex, and training, and tends to decline with age.
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🔗 Related Terms
More Health & Fitness Terms
- Basal Metabolic Rate (BMR)
- Body Composition
- Body Fat Percentage
- Body Mass Index (BMI)
- Calorie
- Calorie Deficit
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Last updated: September 27, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.