“Just a minute…” How many parents have heard this phrase from their kids, absorbed by their smartphones, in response to the umpteenth appeal for them to go to bed? How many of us have told ourselves the same thing while idling through Facebook or Whatsapp messages after midnight?
The effects of mobile phones on sleep are not just a matter of less time asleep: research was published just a few weeks ago by the University of California which links a constant use of smartphones with a poor quality of sleep.
The relationship between sleep and extensive mobile phone use has been studied since 2008, when the smartphone phenomenon had not yet exploded but simple text messaging was already becoming a problem. The study highlighted a reduction in the quantity of deep sleep, attributed in particular to the exposure of 884 MHz wireless signals.
Experts generally focus on two aspects that link poor sleep to mobile phones:
- on one hand, there is light stimulation which even occurs when the ring tone is silenced and can affect melatonin production, because the wavelengths generated by the small screens are precisely those which the retina finds most sensitive
- on the other hand, the levels of activation, which remain especially high when someone has started a conversation and is waiting for the other person to respond, prevent the proper relaxation required of natural sleep.
Therefore, it is always a good idea to remove all gadgets from the bedroom, including smartphones, and to make the room as conducive to sleep as possible. In particular, these rules should be laid down for teenagers, who in several studies are found to be the group least inclined to detach themselves from these “infernal devices”.
PS: the problem has spread further than you can imagine; what happens if you start to write “how to switch off…” on Google? Try it and see for yourself!