The results From this study Get Heart Healthy by Lifting Weights :
Resistance training is more beneficial than many believe," says lead researcher, Dr. Scott R. Collier. The resistance exercises produced a different pattern of blood vessel responses than the aerobic exercise, suggesting that the former may have important and unique benefits for cardiovascular health. The resistance exercise produced greater increases in blood flow to the limbs—even though it also caused small increases in central arterial stiffness. In contrast, aerobic exercise decreased arterial stiffness—but without an increase in blood flow.
Resistance exercise also led to a longer-lasting drop in blood pressure (as much as 20 percent) after exercise, compared to aerobic exercise.