Sleep Hygiene
Do Blue Light Glasses Help You Sleep?
The evidence does not support blue light glasses as a sleep aid. A 2023 Cochrane review of blue-light filtering lenses found no clear benefit for sleep quality, and ...
July 24, 2026
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Sleep Hygiene
Does White Noise Help You Sleep?
White noise works by masking, not by soothing. A steady background sound narrows the gap between quiet moments and sudden noises, so a slamming door is less likely t...
July 24, 2026
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Sleep Hygiene
The Best Bedroom Temperature For Sleep
Most sleep guidance points to a cool bedroom, commonly around 65 to 68 degrees Fahrenheit, or roughly 18 to 20 degrees Celsius. The mechanism behind it is well estab...
July 23, 2026
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Sleep Tracking
Your Watch Flagged Irregular Breathing In Sleep: What Next?
A breathing or blood oxygen alert from a watch or ring is not a diagnosis. It is a signal that a pattern in your data resembled something worth checking. Repeated fl...
July 27, 2026
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Sleep Tracking
How To Keep A Sleep Diary
A sleep diary is a short daily record of when you slept and how you felt. Two weeks is the usual length, and it takes about a minute each morning. Sleep clinicians s...
July 27, 2026
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Sleep Tracking
Orthosomnia When Sleep Tracking Makes Sleep Worse
Orthosomnia is the term clinicians use when the pursuit of perfect sleep data starts interfering with sleep itself. It was named in a 2017 case report describing pat...
July 27, 2026
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Sleep Tracking
What Does Your Sleep Score Actually Mean?
A sleep score is not a measurement. It is a number each company builds by weighting several inputs, some of which are themselves estimates. No industry standard exis...
July 27, 2026
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Sleep Tracking
Are Sleep Stages On Your Watch Accurate?
Sleep stage data from a watch or ring is the least reliable number your device produces. Validation studies find consumer wearables agree with laboratory sleep stagi...
July 27, 2026
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Sleep Tracking
How Accurate Are Sleep Trackers
Sleep trackers are good at one thing and much weaker at another. Research comparing consumer devices with clinical sleep studies finds they detect sleep versus wake ...
July 27, 2026
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