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Eating too much and not exercising may be the main causes of obesity, but it turns out they aren't the only things that build the bulge.
Studies have shown the most unexpected things can pack on pounds from getting your tonsils out, to having a whole array of "obesity genes."
These days, 1 in 3 U.S. adults is overweight or obese, according to the Centers for Disease Control and Prevention, so every factor counts in the fight against extra pounds.
Take a look at 11 surprising things that could be making you gain weight.
Catching one strain of the cold virusSlide 2 of 23
Catching one strain of the cold virus
Children exposed to a particular strain of the common cold virus called adenovirus 36 are more likely to be obese than those not exposed, according to findings in the journal Pediatrics in September. In a study of 124 children, nearly 80 percent of those exposed were obese. They weighed an average of 50 pounds (23 kilograms) more than kids not exposed.Slide 3 of 23
Turning on the A/CSlide 4 of 23
Turning on the A/C
When living in constantly comfortable temperatures, the body doesn't have to work to keep cool or warm, according to a 2006 article in the International Journal of Obesity. In the South, a region with some of the highest obesity rates in the United States, the percentage of homes with air conditioning increased from 37 percent in 1978 to 70 percent in 1997, the study said.Slide 5 of 23
Having a working momSlide 6 of 23
Having a working mom
Kids with a working mom are more likely to be obese than kids whose moms stay home, according to study published in May in the American Journal of Epidemiology. University College London researchers followed 8,552 kids in 1965 and compared their weights to 1,889 children in 1991. They found the 1991 children whose moms worked were more likely to be obese than children whose moms stayed at home. However, researchers caution, they didn't examine diet or physical activity, which are likely to partially account for the results.Slide 7 of 23
Not getting enough sleepSlide 8 of 23