More people are becoming obsessed with sleep trackers, causing insomnia and making sleep worse, experts say. Here’s how to ...
Sleep trackers provide valuable insights into your ... quality with the sleep cycle analysis that examines your light and REM sleep stages. Withings also tracks your heart rate and detects snoring ...
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“Her tracker was off-label — I had never heard ... and rapid eye movement, or REM, sleep, which is the stage in which we dream. Experts say about 50% of your night should be in light sleep.