Recovery connects your sleep pattern with your heart rate at rest and after exercise. Its four signals help you understand how these measurements contribute to Titan Age across the last completed week, Monday through Sunday. Together they carry 46% of the model.
The Recovery section shows how your sleep and heart rate measurements affect Titan Age.
014 recovery contributors
Resting HR carries 18% of the model. Titan averages your daily resting heart rate for the week and needs 4 days with a value.
Sleep carries 12%. Titan averages your nightly hours asleep and needs 4 nights.
Heart rate recovery carries 10%. Titan estimates the two-minute drop in heart rate after a workout and needs 2 workout days. Apple Watch records the drop at one minute, so Titan multiplies that value by 1.65 and keeps the result between 10 and 70 bpm.
Sleep Consistency carries 7%. Titan averages your daily consistency values and needs 4 days with a value. See sleep consistency for how each night is scored.
02Contributions in years
The Recovery total shows how many years its four contributors add to or subtract from Titan Age together. A negative total lowers your estimate. A positive total raises it. Each contributor also shows its own effect in years, so you can see which measurements are lowering or raising your Titan Age.
Tap a row to see its neutral reference value. If the row is missing, it also shows the value Titan counted in its place. Recorded heart rate recovery rows add a fitness rating when you expand them.
The row percentages are rounded, so they may not add exactly to 46%. Smoothing and adjustments for existing history also mean one week's contributions do not sum to the gap between your Titan Age and your actual age.
03How missing data is handled
A row below its minimum days counts as missing. Once Titan has at least 6 recorded weeks for that row, it fills the missing value with the median of its last 26 recorded weekly values, or all recorded values if there are fewer than 26. Otherwise, it uses the row's reference value, which adds zero years.
Coverage measures how much recorded data is available for the week, weighted by each row's share of the model. Missing a row with a larger weight reduces coverage more. Filling a missing value does not restore coverage. Lower coverage reduces every row's contribution in years. Calculation details on the Titan Age screen lists the days of coverage for each row.
04Recovery data sources
Resting heart rate, sleep, and heart rate recovery come from Apple Health. Apple Watch is the usual source. Sleep uses the tracker you chose in Titan, and choosing your sleep source covers that choice. Sleep consistency comes from the same nightly sleep records. Heart rate recovery comes from workouts with a recorded recovery reading.
Your daily Recovery score is another view of readiness. It is a separate calculation with its own inputs, and it appears on Today.
05Find missing recovery data
Start with Set up Apple Health for Titan. Then check these in order.
- Confirm that Health shows the data. For sleep, wear your watch to bed. For heart rate recovery, record a workout with your watch.
- Open Health permissions for Titan and confirm the category is on. See Health permissions.
- Count the days. Resting HR, Sleep, and Sleep Consistency each need 4 days or nights in the week. Heart rate recovery needs 2 workout days.
- Wait for the week to close. Titan Age updates after Sunday ends.
If the whole card is blank, see Titan Age missing or not updating.
