The American Heart Association recommends physical activity to help lower the risk of heart failure, but how much exercise is needed, especially for older women, to lower that risk? According to a recent study, even just low-intensity exercise for 30 minutes is associated with a 25 percent lower risk of overall heart failure. Dive further into the findings with Dr. Javed Butler and Dr. Michael LaMonte, a Research Professor of Epidemiology and Environmental Health at the University of Buffalo.