Some medical experts advise you might want to put down your cell phone, your iPod, your netbook or any other digital device that you use whenever you get a spare second.
Researchers at the University of California, San Francisco and the University of Michigan told The New York Times that the time most of us spend using those digital devices -- is taking away time the brain's need to rest.
The average American adult now spends 8.5 hours a day staring into screens, according to the Council for Research Excellence.
Games and applications on phones are meant to fill any small amount of free time you might have while standing in line at the grocery store or sitting at a stop light or when exercising.
But experts suggest that even if you're feeling entertained, you could be taking in too much information and making your brain too tired to work as well it should.