But did reading on the iPad actually change sleep quantity/quality above and beyond the timing of melatonin? It did, in three concerning ways. First, individuals lost significant amounts of REM sleep following iPad reading. Second, the research subjects felt less rested and sleepier throughout the day following iPad use at night. Third was a linger

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Another problem with trackers is that sleep requirements are unique to each person. The “ideal” eight hours sleep a night is an average – some people will need more, some less; being told you are falling short can cause anxiety. “The population level data would suggest most adults need somewhere between seven and nine hours sleep a night, on averag... See more