http://articles.mercola.com/sites/articles/archive/2001/03/31/heart-disease-part-three.aspxWomen who spend as little as 1 hour walking each week can cut their risk of heart disease in half. The study found that walking, even at a moderate clip, reduced heart disease risk among nearly 40,000 women, including those who smoked, were overweightenCommunityServer 2008.5 SP1 (Build: 31106.3070)