Cardio
Estimate your VO₂ max aerobic capacity using the Cooper run test, Rockport walk test, or a no-exercise questionnaire.
Your estimate is plotted against broad aerobic fitness bands.
Estimated Fitness Age
15 years
Method: Non-Exercise Estimation (Nes et al.)
Formula: VO₂max = 100.27 + 7.17×PA − 0.164×wt − 0.39×age − 18.07×sex
Field-test estimates are approximations. Lab-grade VO2 max testing (gas exchange analysis) is the gold standard. Consult a healthcare professional before starting any new exercise program.
Contract, discovery endpoints, and developer notes for agent use.
Always available for agents
Tool contract JSON
https://aifithub.io/contracts/vo2-max-estimator.jsonStable input and output contract for this exact tool.
Human review
People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.
{
"tool": "vo2_max",
"method": "questionnaire",
"age": 30,
"gender": "male",
"weight_kg": 75,
"activity_level": "moderate"
} No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.
Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.
Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.
Three validated methods: Cooper 12-minute run test, Rockport 1-mile walk test, and a no-exercise questionnaire based on the Nes et al. (2011) regression model.
Field tests typically correlate 0.85–0.95 with lab-grade gas exchange testing. They are useful for tracking trends but not as precise as clinical measurement.
For males: 40–50 ml/kg/min is Good to Excellent. For females: 35–45 ml/kg/min. Elite endurance athletes can exceed 70 ml/kg/min.
Fitness age estimates your biological age based on aerobic capacity compared to population norms. A 50-year-old with superior VO₂ max may have a fitness age of 35.
Yes. AI Fit Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Related Resources
Every link here is tied directly to VO2 Max Estimator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
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