In my youth I perfected the art of sleeping, you could drop a bomb next to me and I wouldn't wake up.
That is not the case these days and insomnia cycles come and go. I'm told it's an age thing. However I have seen a number of claims that sleep disruption can be due stimulation from artificial light at the wrong times of the day.
Well today I learned that there have been scientific studies specifically related to exposure to smartphones.
The conclusions were as follows:
Our findings demonstrate that we spend a substantial portion of our time looking at our smartphones. Screen-time differs across age, race, and ethnicity and may be culturally driven by different norms or other environmental determinants. Screen-time exposure varies throughout the day, with most exposure occurring during the day, but some individuals have peaks of use during the night. Exposure to a smartphone screen, particularly around bedtime, is associated with a lower quality of sleep.
The full study can be found here: