The five types of sleep and what they can tell you about your health

Credit: David Baillot/University of California San Diego

UC San Diego PhD student Varun Viswanath is the paper's corresponding author. The researchers analyzed data from the Oura ring, a smart wearable that tracks temperature, sleep and other information.

« The five types of sleep and what they can tell you about your health

Credit: Oura

Researchers signled out five types of sleep based on analyses of five million nights across roughly 33,000 people wearing an Oura ring.

« The five types of sleep and what they can tell you about your health

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