Readiness Score, Sleep Score, and Activity Score — the inputs, the weightings, and what each number actually represents.
Oura Ring is a finger-worn wearable that uses PPG (photoplethysmography), accelerometry, and thermometry to track sleep, recovery, and activity. The ring form factor improves signal quality compared to wrist devices — the finger's digital arteries provide a stronger, more consistent PPG signal.
Readiness is Oura's daily recovery composite, updated each morning. It weights multiple inputs against your personal baselines rather than population norms.
| Input | Relative Weight |
|---|---|
| HRV balance (vs 7-day rolling baseline) | Very high |
| Resting heart rate (vs personal baseline) | High |
| Body temperature deviation | Medium-high |
| Sleep score (prior night) | Medium-high |
| Recovery index (how quickly HRV stabilized during sleep) | Medium |
| Previous day activity | Low-medium |
Score interpretation: 85–100 = Optimal (green), 70–84 = Good (yellow), below 70 = Pay attention (red).
Sleep Score aggregates the quality and quantity of previous night's sleep. Key contributors: total sleep time, sleep efficiency, restfulness (number and duration of awakenings), REM sleep, and deep sleep. Sleep timing regularity is also factored in newer firmware versions.
Activity Score reflects daily activity against your target — meeting move goals, training frequency, recovery from activity, and avoiding inactivity. Unlike Readiness, it updates throughout the day.