E-books 'damage sleep and health,' doctors warn

本帖最後由 toylet 於 2014-12-27 00:24 編輯

In short: 睡前不要讓對眼見咁多強光啦.....

If you curl up under the duvet with an e-book for a bedtime read then you are damaging your sleep and maybe your health, US doctors have warned.

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.

Original Kindle readers do not emit light so should be fine, say experts.

Experts said people should minimise light-exposure in the evening.

Whether you are perusing the Man Booker shortlist or leafing through Zoella, the impact of reading on your sleep is probably the last thing on your mind.

But there has been growing concern about the dangers of light before bedtime.

Body clock

Our bodies are kept in tune with the rhythm of day and night by an internal body clock, which uses light to tell the time.

But blue light, the wavelength common in smartphones, tablets and LED lighting, is able to disrupt the body clock.

Blue light in the evening can slow or prevent the production of the sleep hormone melatonin.

Twelve people were locked in a sleep laboratory for two weeks.

They spent five days reading from a paperback and five days from an iPad.

Regular blood samples showed the production of the sleep hormone melatonin was reduced by reading an e-book.

People also took longer to fall asleep, had less deep sleep and were more tired the next morning.

The researchers said other e-readers such as the Nook and Kindle Fire produced similar wavelengths of light and would have the same impact.

The findings were published in the journal Proceedings of the National Academy of Sciences.

Full Article: http://www.bbc.com/news/health-30574260
Reported by: HKGolden



最簡單都係背咗尐內容佢. 噉就問題少尐.


kenlll 發表於 2/1/2015 21:23
最簡單都係背咗尐內容佢. 噉就問題少尐.
polarhei 發表於 3/1/2015 13:01

篇嘢未夠數據立論, 所以大家當參考啦!


回覆 4# toylet

討論區不太需要認真. 況且, 有好多例子如將論語全部背下, 把長達二拾分鐘獨奏樂譜背下等.

可以是要求, 或是自身修為方式......