How do activity trackers know when I’m asleep? How they deduce REM sleep, deep sleep etc?
In: Technology
They do it by Actigraphy. Smart watches mostly come with extremely sensitive motion sensors, which keep a track of our movements in every direction and then translate those movements into sleep patterns. Still, calculation of REM sleep in particular is not very accurate as we have to do an EEG to record brain waves during REM sleep. They mostly indicate whether a person is asleep or awake.
Latest Answers