These hours have been linked to teen sleep deprivation and a laundry list of associated health, safety, and school problems, including obesity, depression, car crashes, truancy, tardiness, and substance abuse.
As we bring 2013 to a close, we're taking a look back at the sleep stories that made news this year. With so many fascinating developments in sleep science, it was hard to narrow it down, but here are the most challenging, eye-opening, important sleep stories from the second half of 2013.
The assumption is that the teenagers are falling asleep because they are bored or disinterested in the class. Was elementary school more exciting than high school? No, that is not the reason. It is a misconception that boredom causes sleepiness. Boredom just unmasks sleep deprivation.
Biological changes are an important part of the teen-sleep picture, but they don't tell the whole story. Combined with these biological shifts are environmental and lifestyle factors that also can interfere with teens' sleep.
Researchers found that opting to delay bedtime in favor of studying was linked to an increased risk of both types of academic difficulty. And this was true regardless of the total amount of students' study time.