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 the healthcare spending . The study showed the cost of inactivity to the world economy at almost $ 68 billion annually For the new study , researchers .stratified people into two broad groups :those who did or did not meet national exercise guidelines ,which recommend that someone work out moderately for 30 minutes five times a week. It turned out that ,on average