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Readiness and recovery scores

One maker-defined number combining sleep, heart and activity data.

What goes in
  • Oura: lowest resting heart rate and its timing, body temperature, sleep, yesterday's movement, plus HRV, sleep and activity balance against a two-month baseline.
  • Garmin: heart rate variability, stress level, sleep quality and activity.
  • Whoop: resting heart rate, HRV, respiratory rate and sleep.

Source: Oura, Garmin, WHOOP

Accuracy
  • These scores have no clinical standard.
  • They carry the limits of their inputs: resting heart rate, HRV, sleep stages and skin temperature.
Using the trend
  • Compare a night or week with your own pattern; a single low day is common.
  • A score low for weeks, with tiredness, a higher resting heart rate or disturbed sleep, is worth mentioning to a GP.
Questions
Is Readiness the same as Recovery or Body Battery?
No. Each is a different formula owned by its maker, so scores cannot be compared across brands.
Is a low score a health warning?
It is not a clinical measure: it reflects your recent data run through the maker's formula. A single low day is common.
Sources

When to get advice: The score is not a symptom; the NHS advises a GP visit if trouble sleeping has lasted months or is hard to cope with.

Cheapest trackers that measure it

  1. 1

    Amazfit Bip 6

    Smartwatch · battery up to 14 days

    • HRV
    • Sleep stages
    • Blood oxygen
    • GPS
    • Cycle tracking
    3 years
    £79.90
    Price
    £79.90
    Subscription
    Optional
  2. 2

    Fitbit Inspire 3

    Fitness band · battery up to 10 days

    • HRV
    • Sleep stages
    • Blood oxygen
    • Skin temperature
    • Cycle tracking
    3 years
    £84
    Price
    £84
    Subscription
    Optional
  3. 3

    Fitbit Air

    Fitness band · battery up to 7 days

    • HRV
    • Sleep stages
    • Blood oxygen
    • Skin temperature
    • Cycle tracking
    3 years
    £84.99
    Price
    £84.99
    Subscription
    Optional
  4. 4

    Garmin Index Sleep Monitor

    Fitness band · battery 7 nights with SpO2

    • HRV
    • Sleep stages
    • Blood oxygen
    • Skin temperature
    • Cycle tracking
    3 years
    £119
    Price
    £119
    Subscription
    Optional
  5. 5

    Amazfit Active 2

    Smartwatch · battery up to 10 days

    • HRV
    • Sleep stages
    • Blood oxygen
    • Skin temperature
    • GPS
    3 years
    £129.90
    Price
    £129.90
    Subscription
    Optional

All 72 that measure it

Readings are not a diagnosis. If you are worried about your health, speak to your GP, pharmacist or NHS 111. How we earn.