Why 'Short Sleepers' Dream Big
Some of us—but not many—really do thrive on little sleep
By Matt Cantor,  Newser User
Posted Apr 10, 2011 4:18 PM CDT
Time to get up.   (Shutterstock)

(Newser) – You may think you don't require much sleep, but you probably need at least seven hours—unless you're part of the 1% to 3% of the population known as “short sleepers." These folks turn in past midnight and get up after just a few hours, brimming with energy—all without the benefit of naps or caffeine. “These people talk fast. They never stop. They're always on the up side of life,” a researcher tells the Wall Street Journal. Though little is known about short sleepers, some studies suggest they may have a mild form of mania known as hypomania.

Scientists haven’t learned a lot about short sleepers: one expert says he’s only found 20 so far. "There aren't nearly as many as there are people who think they're short sleepers," says a psychiatrist. The condition may be genetic: It seems to run in families, and one research team noted a certain gene variation in two subjects, allowing them to genetically engineer short-sleeping mice. Bad news for the rest of us: Scientists say you're either born a short sleeper or you're not; there's no way to turn yourself into one.