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Night Owls May Pack on More Pounds

Study found they ate worst foods late at night, long after sound sleepers had hit the sack

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The findings are published in the July issue of the journal Sleep.

Previous studies have shown a link between inadequate sleep and weight gain, Winter said, but this research is valuable because it provides precise observations in a laboratory setting.

"Anytime you're dealing with studies in the field, you're often relying on some sort of food diary or the recall of the patient," Winter said. "It's amazing how much food a person can eat and not remember. It's hard to keep track of people in terms of their eating and in terms of their sleep. When people are in a lab, they can perfectly control conditions and report them."

Blacks gained more weight than whites, and males gained more weight than females. Researchers currently are undertaking follow-up research involving detailed calorie counting to try to explain these differences, Spaeth said.

The study adds more weight to the growing mound of evidence suggesting that people who want to control their weight need to get seven to eight hours' sleep a night, Winter said.

People who can't get a good night's sleep -- such as people who are traveling or working late to meet a deadline -- need to pay extra attention to their food cravings, he added.

"God knows I'm aware of it," Winter said. "I'm usually traveling a lot, and I can feel myself craving food I don't really need and didn't know I wanted. I know when I'm going through an airport late at night and I see chocolate-covered pretzels, I know I'm not craving them because I'm hungry. I think if patients are more aware of those things, they're going to say, 'I'm not going to eat this because I'm not hungry, and it's not going to do me any good.'"

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