We Tested a Dozen Sleep Trackers—These Are the 6 Best for a Good Night’s Rest

By Jack Byram, Mar 24, 2024

According to Dr. Dimitriu, most sleep trackers work by tracking heart rate and heart rate variations, as well as through tracking movement and body temperature. When it comes to sleep stage tracking, he says that heart rate, breathing, and movement are what is being used for this, but he does warn that these can be hard metrics to track, even with an EEG (brainwave recorder) in a lab.  

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