Not so fast Missippi. You may be the heaviest, but even the leanest state isn't far behind, health officials warn.

Colorado ranks as the leanest state in the nation in a new obesity report, but state health officials cautioned that the numbers could be deceptive because a majority of the state's residents are overweight or obese, MyFox Colorado reported.

The Trust for America's Health said Colorado's obesity rate was projected at 17.6 percent, an increase of just under a percentage point from the previous survey.

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But the state's own figures show an obesity rate last year of 18.2 percent and an overweight rate of 36.7 percent, said Rachel Oys, who coordinates obesity prevention programs for the state health department. That means less than 50 percent of the state's residents are in a healthy weight range, she said.

"We're moving in the wrong direction," cautioned Jim Hill, director of the Center for Human Nutrition at University of Colorado Health Sciences Center . "If this keeps up, in the next few years we're going to be as fat as Mississippi ."