Name: 錠剤は本当に睡眠を乱すのか？ (Do Tablets Really Mess With Your Sleep?)
Uploaded: 2021-01-14T05:21:41.000Z
Duration: 2 min 49 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

“You darn kids with your e-pads and your i-books! In my day words were on dead trees

程度の副詞

and they didn’t keep us up all night!” Calm down angry grandpa I just made up, the

right e-reader will still let you get to bed by 6 pm.

Hello bibliophiles, Julian here for DNews. You’ve probably seen some stories recently

warning you that your e-reader is plotting to give you insomnia and maybe cancer.

These articles are stemming from a recent study published December 22nd in the Proceedings

of the National Academy of Sciences. In the study 12 subjects each read books either in

paper form or an ipad for 4 hours a night, 5 nights in a row. The next week they would

switch to the other format and spend another 5 nights reading for 4 hours before bed. Talk

about a great excuse to re-read the Harry Potter series.

The study found that those who read on the newfangled ipads took longer to fall asleep,

spent less time in REM, and woke up feeling more tired. The hypothesis is the short-wavelength

or blue light from the ipad inhibited the release of melatonin in the subjects, and

Melatonin is a hormone synthesized from the amino acid tryptophan and it makes you feel

sleepy. If you’re American you’re probably familiar with the myth that thanksgiving turkey

makes you sleepy because of the tryptophan. Let’s put that rumor to bed right now, because

turkey actually has slightly less tryptophan than chicken. Anyway, an enzyme with a really

long name I can’t pronounce so we’ll call it AANAT is key for turning tryptophan into

melatonin. And as it turns out, AANAT’s gene responds directly to light.

Given recent evidence of a link between melatonin suppression and increased risk of breast cancer,

colorectal cancer, and prostate cancer, the researchers of this study warn that using

an e-reader like an ipad before bed could have bigger impacts than grogginess the next

But before everyone freaks out and sets their kindles on fire, there is an important nuance

that David Meyer of Gigaom points out; this study only uses an ipad, at full brightness.

It doesn’t examine other e-readers like my ancient kindle that still needs a reading

lamp, or newer devices that are front-lit like the Kindle Paperwite or the Nook GlowLight.

We don’t know if these other ebooks are better, but it’s not fair to lump them all

together because they don’t work the same. The study didn’t dial down the backlight

of the ipads either, so it’s possible that dimming them down will allow more melatonin

As we love to say here on DNews, more research is needed. Of course if you notice you’ve

been having trouble sleeping after reading off your tablet, maybe try one of the other

methods or tone the brightness down a little. If you’re still having trouble, try reading

your school’s required books. Those always knocked me right out.

Of course an e-book will always be missing something we just love about their paper predecessors;

that old book smell. Trace explains why we like that over here.

Have you guys had trouble sleeping after using a dedicated ebook? Or have you had trouble

retaining information when you didn’t with regular books? Let us know in the comments