Just 30 minutes of walking five days a week is enough to reduced medical costs. A new study shows that you can save $2,5 00 a year ,the saving ,the result of reduced medical costs ,requires just a good walking ,five days a week. The findings come from an analysis of 26,239 men and women , published in the Journal of the American Heart Association . Researchers decided to see if they could determine what being active or inactive costs each of us annually in ...