VO2 Max
VO2 Max is a health-education page for Yuelu Body Age. VO2 Max measures the body’s ability to take in, transport, and use oxygen, and is a core fitness signal in Body Age. Read it as trend context rather than a judgment from one day.
Role in Body Age
VO2 Max contributes to the fitness dimension of Body Age. Yuelu combines it with the other sleep, activity, and fitness signals so one weak or missing signal does not define the whole result.
Current Yuelu Method
| Field | Current rule |
|---|---|
| Data source | Apple Health vo2Max |
| Lookback window | Representative value from the last 30 days |
| Metric | representativeValue(lookbackDays=30) |
| Missing-data rule | Missing when no recent usable value is available |
The same VO2 Max can map differently across ages and biological-sex references. Apple Watch estimates are useful for long-term trends, not laboratory diagnosis.
How to Improve
- Use trends rather than a single day of data.
- Support the signal with regular aerobic work and enough recovery.
- Remember that illness, temperature, altitude, medication, and fatigue can affect values.
- Seek medical guidance if abnormal heart or breathing symptoms appear.
When Data Is Missing
Check Apple Health permissions, source priority, Apple Watch battery and wear time, and whether the relevant samples were recorded recently.
Rule Basis
- Yuelu Body Age follows the current in-product calculation rules for sleep, activity, and fitness signals.
- Data is read from authorized Apple Health and Apple Watch samples when permission is granted.
- Interpretation is for wellness education and product explanation, not medical diagnosis.
Disclaimer
This material is for health education and product explanation only. It is not medical diagnosis or treatment advice. Consult a qualified clinician for persistent symptoms or health concerns.