A printed book better than an e-book to fall asleep
A printed book better than an e-book to fall asleep
Reading an e-book does not help falling asleep. Just the contrary. This is what found researchers at the Brigham and Women’s Hospital in Boston, who affirm that lights and waves emitted by such electronic devices alter the circadian clock that synchronizes the daily rhythm of sleep to external environmental time cues. A group of volunteers was asked to read an e-book or a printed one for a period of two weeks before going to bed.
The result was those choosing the first option took longer to fall asleep, were less sleepy in the evening, and spent less time in REM sleep. Also, had reduced secretion of melatonin, a hormone which normally rises in the evening and plays a role in inducing sleepiness.
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