In 2005, about 24% of Americans were obese. But by 2007, that number had risen to 25.6%. Obesity was measured for the study using the body mass index (BMI). People whose BMI exceeded 30 fell into the obese category.
America’s heaviest states are Alabama, Mississippi and Tennessee, which are home to adult populations that are 30% medically obese, according to the study. On the flip side, Colorado was the thinnest state, with only 18.7% of the population deemed obese. Regionally, the southern states have the heaviest adult populations, with a 27% obesity rate, whereas the Midwest had an obesity rate of 25%, the Northeast 23% and the West 22%. Read more about the study here, or check out a government BMI table here.