The risks
Why phone in bed is harmful
Later, lighter sleep
Reading on a light-emitting screen before bed delayed sleep, lowered melatonin, reduced REM sleep and left people less alert the next morning.
Source: PNAS, Chang et al. 2015Most people feel it
About 38% of adults say screens at bedtime make their sleep worse. For 18 to 24 year olds it is nearly half.
Source: AASMBetter sleep when you stop
People who put their phone away 30 minutes before bed for four weeks fell asleep faster, slept longer and had better working memory.
Source: PLOS ONE, He et al. 2020