Study : When O'Connor and his colleagues broke down the results based on how well people were sticking to the exercise recommendations , an analysis not published in the JAMA paper , more striking differences emerged . Exercise in heart-failure patients is safe , helps well-being , reduces mortality . About 5 million people in the United States have chronic heart failure . Comment:
Study : Exercise in heart-failure patients is safe , helps well-being , reduces mortality . About 5 million people in the United States have chronic heart failure . Comment: