Add Yahoo as a preferred source to see more of our stories on Google. Here's What 'Core Sleep' Really Means, According to Your Apple Watch - Beth Skwarecki Let's talk about one of the most confusing ...
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What does core sleep mean on an Apple Watch?
Apple has never been shy about inventing its own vocabulary for technical terms, and some of the tracking metrics on the Apple Watch are no exception. Case in point: core sleep. It's a term Apple uses ...
Add Yahoo as a preferred source to see more of our stories on Google. Person wearing a wearable sleep tracker in bed Light sleep is the beginning of your sleep cycle and your body's way of winding ...
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How much deep sleep do you need?
Deep sleep is the mentally and physically restorative stage of sleep. How much of it do you actually need?
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