Is Your Alarm Clock Making You Fat?

In the industrialized world, a conflict between two opposing forces — biology and the alarm clock — is helping to make people fat, new research suggests.

A discrepancy between the natural timing of sleep and work or school schedules leads to sleep deprivation, since people forced into schedules unnatural to them don't get enough sleep. And survey data indicates people with larger discrepancies are more likely to carry extra weight, according to the researchers.

"We are biological beings, and we have a biological clock, and what society — and I don't mean the bad guys, I mean all of us — is ignoring is the biological clock," said study researcher Till Roenneberg of the University of Munich. "We think we can do whatever we want with the social clock."