Sleep Tracking
Wearables estimate your sleep stages from movement and heart rate. That is useful for spotting trends, and less reliable for judging any single night.
Trends, not a lab reading
- WhenYou want real value from a trackerWatch weekly trends, not single nightsWhyThe consistent direction — are you improving? — is far more reliable than any one night’s stage estimate.
Obsessing over the score can backfire: anxiety about a 'bad' sleep number can itself worsen sleep — a pattern clinicians nicknamed orthosomnia.
Recall check from the same lesson
Sleep trackers are more reliable for spotting weekly trends than for measuring any single night's stages.
Review the explanation
Answer: True. Stage estimates are inferred from motion and heart rate and can miss badly on a given night, but the direction of change across weeks tracks reality much better.
One sitting · 20–30 minutes
A focused session on Sleep tracking
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