Look around you: the guy nodding off on the bus, the co-worker snoozing during a dull presentation, the people with heavy eyelids lined up at the coffee shop in mid-afternoon. Like them, your job may be leaving you sleep deprived -- and you may not even realize it.
Q: My friend says I'm ruining my health by pulling all-nighters, but I say it's no big deal. Who's right?
A: You're kidding, right? People do vary slightly in their sleep needs, but the idea that a person can exist on three or four -- or no -- hours of sleep a night is FALSE. In fact, you're in the crowd of college students who are chronically sleep-deprived -- which research links to a variety of health problems.
"Lack of sleep impairs your ability to learn, remember, and process new facts,"...
"I do think that perhaps the No. 1 sleep problem in America is willful sleep limitation. People are working too hard and purposely limit themselves to six hours when they should be getting seven or eight," says Lisa Shives, MD, founder of Northshore Sleep Medicine in Evanston, Ill., and a spokeswoman for the American Academy of Sleep Medicine.
Sleepiness appears to be on the rise, according to the National Sleep Foundation. In its 2009 Sleep in America poll, 20% of Americans reported that they averaged fewer than six hours of sleep per night. That’s compared to 13% in 2001.
What Causes Sleepiness?
Sleep problems stem from multiple causes: jet lag, working graveyard or rotating shifts that go against the body's natural sleep rhythms, or skimping on sleep in order to stay on top of a full-throttle schedule.
While many of us are tired from skimping on sleep, others with sleep problems may have bona fide sleep disorders, such as sleep apnea, restless legs syndrome, or narcolepsy. People who work graveyard or rotating shifts may have shift work sleep disorder, marked by excessive sleepiness during night work and insomnia when they try to sleep during the daytime.
Regardless of the cause, excessive sleepiness "is becoming more of a legitimate complaint," both among patients and doctors, says David G. Davila, MD, a National Sleep Foundation spokesman and board member who practices sleep medicine in Little Rock, Ark. He sees men and women who can't muster enough alertness to finish mental tasks or who struggle to stay awake while driving -- and many who doze off in his waiting room.
Some try to cope with excessive sleepiness through caffeine or stimulants, he says. "They'll come in actually complaining of insomnia because they're at Starbucks too much, and they're piling on the caffeine too late in the day. They're really responding to sleepiness, but then they end up getting secondary insomnia related to the caffeine."