Some of the best exercises you can do for your heart are burpees, row machine, aerodyne assault bike, and interval sprints. These are dynamic movements recruiting nearly all muscle groups within the body.
These high intensity aerobic movements require increased oxygen and blood flow to the muscles, so the heart has to work harder and thus begins to become far more efficient at producing the most amount of oxygen saturated blood flow. Over time your resting heart rate will slow and your blood pressure will regulate within healthy ratios. Your VO2 max will increase and entire cardiovascular system will be at far better production.
*VO2 Max = is the measurement of the maximum amount of oxygen that an individual can utilize during intense, or maximal exercise.
Aerobic training should be performed 5 x per week vs 3 x per week anaerobic. You can kill two birds with one stone by incorporated your anaerobic and aerobic exercises together in the form of high intensity application. Faster pace and minimize rest periods. High intensity exercise should last anywhere between 12 - 45 min.