The BBC reported that ”
A team from Harvard Medical School compared reading paper books and light-emitting e-readers before sleep.
They found it took longer to nod off with a back-lit e-reader, which led to poorer quality sleep and being more tired the next morning.
The team reports,
“The use of light-emitting electronic devices for reading, communication, and entertainment has greatly increased recently. We found that the use of these devices before bedtime prolongs the time it takes to fall asleep, delays the circadian clock, suppresses levels of the sleep-promoting hormone melatonin, reduces the amount and delays the timing of REM sleep and reduces alertness the following morning. Use of light-emitting devices immediately before bedtime also increases alertness at that time, which may lead users to delay bedtime at home.”
Maybe we should put our phone in a charger outside our bedrooms and plug in our electronic radio-alarm clock; ditch the iPad and pickup a magazine or paperback before sleep.
We’ll feel more energized in the morning.