Onge's study was presented at the American Heart Association's annual conference on nutrition, physical activity, and metabolism.

CNN: Sleep deprivation spurs hunger

Onge says, but it could also be that lack of sleep impairs the ability to make healthy food choices.

CNN: Sleep deprivation spurs hunger

Onge's study may be a step toward answering that "chicken-or-the-egg question" because it included only people of normal weight and therefore eliminated the influence of existing overweight or obesity, says Gina Lundberg, M.

CNN: Sleep deprivation spurs hunger