VO₂ Max & Fitness Age
Estimate VO₂ max from your heart rate and compare with population medians to find your fitness age.
Tool 09 · 1 min · Educational tool
Your result will appear here.
How this works
- Model
- Uth heart-rate ratio + FRIEND medians (v1.0)
- Source
- Uth N et al., Eur J Appl Physiol 2004; Kaminsky LA et al., Mayo Clin Proc 2015 (FRIEND registry). — reference
- Intended use
- Estimate fitness without a lab test.
- Population
- Healthy adults 20–85
- Limitations
- Estimate only; fitness age uses approximate decade medians.
- Not valid with heart-rate-lowering medication.
- Status
- Educational tool · methodology checked 3 November 2026
Educational self-assessment — not a diagnostic test. Results are based on published research and population data and can't account for everything about you. They are not a diagnosis and don't replace advice from a healthcare professional. If you're worried about your health, speak to your GP or call NHS 111.