Sleep
Sleep Stage Estimation Limits
Sleep stage estimation limits remind you that consumer wearables infer light, deep, and REM from movement and HR—not brain waves like polysomnography. Night-to-night stage minutes swing with device placement and firmware updates.
Sleep stage estimation limits remind you that consumer wearables infer light, deep, and REM from movement and HR—not brain waves like polysomnography. Night-to-night stage minutes swing with device placement and firmware updates.
Trust weekly stage trends, not single-night REM guilt.
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