Get Married, Pack On the Pounds

Young adults gain more weight if they're married, a new study shows. People in their late teens and early twenties gain a lot of weight anyway (an average of 15 to 30 pounds), but those who are married gain 6 to 9 pounds more. "The weight gain in this age group is frightening," a nutrition professor tells USA Today.

Researchers say a number of factors may be involved, including pregnancy, having less time, and eating out more. The same level of weight gain wasn't seen in unmarried couples who live together. "When people are dating, there may be more incentive to be thin," says a researcher. The study was presented at the annual meeting of the Obesity Society. (More obesity stories.)