so last year when charles czeisler , a professor of sleep medicine at harvard medical school , found that around 90 percent of americans use some kind of electronic device within the hour before bed — and correlated the degree of use with ever - poorer sleep — one of his first theories of the case was overstimulation .
the bed can hinder a good night 's sleep .
but researchers behind monday 's study , which was supported by a grant from the national institutes of health , set out to decipher what changes in the body cause those disruptions .
 
dr. charles czeisler discusses why this is with tanya rivero .
a note to aspiring self - help writers : the book for better sleep , kitchen sex remains unwritten .
otherwise , though , the idea of stimulus control made sense to a lot of people .
sleep researchers have long warned that watching tv , working on a computer and other activities involving artificial light in the evening can disrupt sleep patterns .