We’ve heard it many times before: don’t sit on your phone before bedtime if you want to have a good nights’ sleep. But have you ever stopped to ask why? Besides the obvious fact that looking at your phone keeps your mind at work, the blue light emitted by our smartphone screens actually keeps us awake longer. Here is how.
The blue light from our screens halts the production of melatonin, the hormone responsible for controlling our circadian rhythms (our body clock, in laymen’s terms) and lets us know it is time to go to sleep.
Usually, without disruption, our bodies produce more melatonin at night then during the day. Using your smartphone before bedtime disrupts this natural process making it harder for us to fall asleep.
So why does blue light have this effect?
Over time, our bodies have become used to associating blue light with alertness, and warmer light with sleep. The sunlight at dawn contains more blue light than the light emitted in the evening, hence why our circadian rhythms are controlled by light.
Our recommendation to solve this problem?
Simply limit your exposure to blue light at least one hour before bedtime. As hard as it may be to put down the awesome iPhone you snagged on Gumtree for a deal!