Sleep · Feature
Sleep Architecture: What Your Wearable Doesn’t Tell You
Your ring or watch tracks sleep stages, but the numbers are statistical estimates — not measurements. A look at where the data is useful, and where it misleads.
By
Dr. Mira Halversson
Contributing Editor, PhD
March 30, 2026
1 min read
This is a placeholder summary of a long feature on consumer sleep wearables, their methodologies, and where to trust them.
The piece compares wearable-derived sleep stages against gold-standard polysomnography across three studies, and offers a practical framework for what to act on (and what to ignore).
