You may want to stand up for this.

A study finds that on average, Americans spend 56 hours per week sitting, Women's Health Magazine reported.

According to the magazine, the "sitting disease is literally killing us."

"Our bodies have evolved over millions of years to do one thing: move," said Dr. James Levine of the Mayo Clinic. "As human beings, we evolved to stand upright. For thousands of generations, our enviornment demanded nearly constant physical activity."

Levine said the age of electronics and advances in technology is to blame for the sitting disease.

"Electronic living has all but sapped every flicker of activity from our daily lives," Levine says.

And, it turns out that women are less likely to move around than men, according to the poll: Women play less sports and tend to have jobs that are less active.

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