Cardiorespiratory Fitness Level by Age and Sex

Classify cardiorespiratory fitness level (very poor, poor, fair, good, excellent, superior) from VO2 max using ACSM age and sex normative tables.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Classify cardiorespiratory fitness level (very poor, poor, fair, good, excellent, superior) from VO2 max using ACSM age and sex normative tables

Each component has a specific meaning:

  • VO2 max — The vo2 max recorded for the scenario being assessed.

Note: Interpret the crf level by age/sex result against the thresholds and context described above.

How to Use

Enter the VO2 max for the scenario you are assessing. Classify cardiorespiratory fitness level (very poor, poor, fair, good, excellent, superior) from VO2 max using ACSM age and sex normative tables. Use the crf level by age/sex result to inform your calculation.

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Frequently Asked Questions