If you're overweight, the best way to spend your limited time exercising is aerobic activity, a researcher says. Rhodes ludovic/iStockphoto.com hide caption

itoggle caption Rhodes ludovic/iStockphoto.com

The government needs to make the most nutritious fruits and vegetables more affordable, researchers say. iStockphoto.com hide caption

itoggle caption iStockphoto.com

The darker the color, the larger the proportion of the population that is obese. In the darkest brown counties, more than 30 percent of people are obese, according to 2008 data. CDC hide caption

itoggle caption CDC