Sleep Stages & Staging Accuracy
6 articles
The “Light Sleep” Myth: Why 50% Light Sleep Is Actually a Success
Seeing your sleep tracker report that 50% to 60% of your night was spent in “Light…
How Much Deep Sleep Do You Really Need? (The N3 Physical Recovery Guide)
Most healthy adults need 1 to 2 hours of N3 deep sleep per night, which equals…
REM Density Explained: What the Intensity of Your Dreams Says About Your Brain
REM density measures the frequency and concentration of rapid eye movements during rapid eye movement (REM)…
The Deep Sleep Mystery: Why Your Eight Sleep and Oura Numbers Never Match
When Eight Sleep reports 1 hour and 45 minutes of deep sleep while your Oura Ring…
Stage 1 vs. Stage 2: When Does “True Rest” Actually Begin?
When reviewing smart bed or wearable data, users often see large blocks categorized broadly as “light…
Sleep Stage Data Variances: Diagnosing Tracker Inaccuracies and Staging Flaws
This guide is part of the master resource: Biometric Sensors and the Sleep Data Engine: The…