Explained in plain English
What's the science of sleep?
Scientists study sleep by looking at brain activity, which is much more precise than the methods smart watches use. They can identify different sleep stages, like REM and deep sleep, by monitoring brain waves. This detailed understanding helps experts know exactly what's happening in your body and mind as you rest.
Stories that explain this
Don't trust your smart watch, experts say sleep quality is personalThis explainer came from a news story
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