Complete Oura Ring App User Guide: Setup, Live Workout Tracking, and Feature Hacks

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Every morning, the app delivers three headline numbers: Sleep, Activity, and Readiness. While the sleep figure reflects overall duration and efficiency, the Sleep staging breakdown isolates your light, deep, and rapid eye movement (REM) phases. Oura's updated sleep algorithm cross-references pulse amplitude and movement to pinpoint these transitions. Pay close attention to deep sleep windows; consistent dips below 15% of your total sleep time often reflect late-evening meals or alcohol consumption.

Your Heart rate variability (HRV) serves as the primary autonomic nervous system indicator. Measured via root mean square of successive differences (RMSSD) throughout the night, higher nighttime HRV typically signifies recovery, while sudden drops warn of fatigue, dehydration, or illness. If your rolling seven-day HRV average drops by more than 1.5 standard deviations, expect your daily Readiness score to decline.

The Readiness score is not an arbitrary grade. It aggregates resting pulse stabilization time, body temperature deviations, previous-day physical load, and sleep balance. When your nocturnal pulse reaches its absolute low during the first half of the night, your body has completed tissue repair and nervous system recovery. If that low point arrives right before your alarm sounds, the algorithm pulls points from your Readiness total, signaling that your body spent the night processing stress rather than rebuilding energy reserves.