Do you enjoy a bit of a read before going to sleep? But do you have a problem getting off to sleep and don’t feel refreshed in the morning?
Recent research carried out by a team from Harvard Medical School has shown, when comparing reading a paper book and a light-emitting e-reader before sleep, that the e-reader can cause sleep disruption. The results showed that it took longer to get off to sleep if you read a back-lit e-reader, which led to poorer quality sleep and being more tired in the morning.
The problem seems to be the light exposure, as the original Kindle does not emit light and does not appear to create the same problem. It seems it is the blue light that upsets our body clocks and can slow or prevent the production of the sleep hormone melatonin.
There is growing concern about the dangers of light before bedtime. This blue light is emitted not only by e-readers but also mobile phones, LED monitor, iPad and tablet. Professor Czeisler, the lead researcher, expressed particular concern for teenagers who are often already sleep deficient.
Modern technology is good, in moderation.