Word: houres
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...researchers' surprise, the greatest improvements appeared in those who spent the most time in the second stage of non-REM sleep. Other procedural tasks that depended more heavily on visual or perceptual ability required periods of deeper sleep or both slow-wave and REM sleep. Sometimes even just an hour of shut-eye made a big difference. Other times a full night's rest was needed. "It's probably going to turn out that different types of memory tasks need different kinds of sleep," says Stickgold...
...mundane things sleep turns out to be for, researchers admit they still don't know the ideal amount of it needed to keep our bodies and brains in good working order. "There's this enormous commercial push now to convince people that if they don't get eight hours of sleep a night, there's something wrong with them," Siegel says. But in fact, there's more mythology than substance to the eight-hour figure. Back in the 1980s, a survey of more than 1 million people found that those who slept more than 7 1/2 hours a night tended...
...shifts are from 5 p.m. until 3 or 4 in the morning," he says. "When you get home late like that over and over again, then you just can't fall asleep as easy. So you stay up an hour. Then an hour becomes two hours. Then the next thing you know, the sun's coming up as you're going to sleep." Eventually, Warren says, "you start to realize it's daytime and you could be doing something with your time, like schoolwork or whatever. Now it's easy to stay...
...flexible work schedules, all-night dining, round-the-clock cable news and home espresso makers, it may be far more common than people suspect. For certain restless, overscheduled Americans intent on squeezing more labor, more fun, more family time and more sheer activity from their lives, the traditional 24-hour day has become an anachronistic inconvenience, much like the sit-down evening meal. Though early-to-bed Ben Franklin might not approve, the famously sleepless Thomas Edison probably would. Why else invent the lightbulb...
...Princeton, Texas, used to take large doses of Metabolife, the over-the-counter diet supplement, before her doctor prescribed a combination of the antidepressant Prozac and the narcolepsy drug Provigil. Carolyn Moncel, 36, who works as a virtual assistant from her computer in Paris, France, fuels her 16-hour shifts with two or three liters a day of Coca-Cola supplemented by 10-minute naps. Betty Sanders, who has worked the graveyard shift at the Dallas U.S. Postal Service Processing Center for more than 18 years, has rejiggered her entire metabolism. She eats dinner at 5 p.m., hits the mattress...