SAN FRANCISCO – APRIL 06: A man walks along the Embarcadero April 6, 2005 in San Francisco. According to a study released Tuesday, almost 53 percent of Californians over 25 are overweight, and more than 17 percent are obese, or extremely overweight and are costing nearly $21.7 billion a year in medical bills, injuries and lost productivity. (Photo by Justin Sullivan/Getty Images)