NEW YORK (Reuters) - Although its known for its beautiful horse farms and as the Thoroughbred Capital of the World, Lexington, Kentucky has gained a new distinction as the most sedentary city in the United States. Along with Indianapolis in Indiana and Jackson, Mississippi it ranked among the most exercise-phobic cities in the nation, according to a new ranking by Mens Health magazine. Seattle, San Francisco and Oakland, California were the most physically active. What hurt Lexington most was the actual amount of activity, or exercise, people reported engaging in any physical activity at all, which was relatively low. And they did have higher rates of deaths from deep vein thrombosis (DVT) as well, said Matt Marion, deputy editor of Mens Health. Southern cities dominated the least active metropolises.