Hands up if you’ve ever woken up from an okay night of sleep, checked your phone, and found that your sleep was “low quality” or that you got very little “deep” sleep. How did you feel the rest of the day? Crappy? It’s possible you can blame your tracker, not your actual level of sleep, at least partially for how you…
from Lifehacker http://bit.ly/2OVQj4I
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