Are Sleep Trackers Worth It? A Realistic Assessment
Sleep trackers promise insights but deliver varying accuracy. They're useful for trends but can cause 'orthosomnia' - anxiety about perfect sleep scores.
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The Truth About Sleep Tracker Accuracy
Consumer sleep trackers measure movement and heart rate to estimate sleep stages. They're about 70-80% accurate compared to clinical polysomnography - good for trends, not medical diagnosis.
What They Get Right
- Total sleep time (usually within 30 minutes)
- Sleep/wake detection
- Week-over-week trends
- Consistency patterns
What They Get Wrong
- Exact sleep stage timing
- Light vs deep sleep distinction
- Sleep quality in people who don't move much
⚠️ Orthosomnia: Obsessing over tracker data can cause anxiety that worsens sleep. If your tracker is stressing you out, take a break.
Best Sleep Trackers by Category
- Most accurate: Oura Ring Gen 3
- Best smartwatch: Apple Watch Ultra with sleep tracking
- Best budget: Fitbit Inspire 3
- Under mattress: Withings Sleep Mat
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