While many states have seen lowering rates of obesity, Arizona has seen an increase, ranking number seven in the U.S. on the worst list.
A recent report stated that Arizona is the only western state in the top ten; researchers on the project say that children need to spend more time outside, being active on a playground.
The number seven ranking comes from a project titled "F as in Fat" which looks at how obesity threatens America's future. It looked at children between 10 and 17-years-old.
The report also stated that 19.8 percent of Arizona children that age are obese.
Arizona was the only western state to rank in the top ten all other states at the top of the list were either in the South or Midwest.
Between 2007 and 2011 the country saw obesity drop, but during that same time Arizona's rate grew two percentage points, which some call a ‘substantial increase'.
The report also points out that obesity leads to a number of challenges, including financial; it states that annual health costs for an obese child are roughly two and a half times more than the average.
The highest obesity rate in the U.S. was Mississippi and the lowest was Oregon.
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