The Oura Ring 5 sets the standard for sleep tracking — I’ve been wearing it for 6 weeks and its accuracy has blown me away. However, the Oura Ring 5, from $399 at Amazon, is a luxury spend and while ...

Thanks to the Internet, it's the age of self-diagnosis. People like to learn about (and treat) themselves through technology. Especially when pretty graphs are involved. As a sleep researcher, I was ...

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