Older women who find it difficult to hit the gym or follow a workout routine may now ward off their risk of developing heart failure by taking brisk walks finds a study. Heart failure -- a condition in which the heart becomes too weak to pump enough blood to meet the body's needs -- rises with age. The study found thatAwomen above 60 years of age were three times more prone to heart failure risk. The paper presented in at the American College of Cardiology's 67th Annual Scientific Session noted that post-menopausal women who walk for 40 minutes or more at a time