People who read on a device that emits light such as laptops and mobile phones before going to bed take 10 minutes or more to fall asleep when compared to people who read from a printed book. Well, that’s at least what a new research co-authored by Anne-Marie Chang claims. Chang is a Penn State biobehavioral health professor.
Level of alertness is also low for users in the following morning. “When you are reading on a light-emitting device, you are directly staring at the light source, whereas if you are reading using a bedside lamp for example, the light that you are receiving is a lot less intense”, explained Chang.
The study was carried out at Boston’s Brigham and Women’s Hospital and recruited 12 grown-ups for two weeks. Brain waves and heart rate was monitored and blood samples were also taken by the study researchers.
The participants who used tablet computers instead of books before bed had shortened periods of REM sleep. This lack of REM sleep might affect the memory and learning capabilities of the victim.
The best way to make sure that one gets a healthy amount of sleep is to not even even read printed books before going to sleep, according to Irene Rosen, a sleep expert at the University of Pennsylvania.
Rosen suggests that bed should only be used for sleeping and for sexual intercourse. In case an individual does any other activity than the two mentioned for more than 15 minutes, than he/she should get out of the bed.