1. An increase in the number of capillaries and mitochondria, which means your body will utilize fat and carbohydrates for more energy. The more you have the more you keep burning and capillary density increases more blood is delivered to your muscles.
2. Decrease time to achieve steady state. This means your body have an easier time going back to its resting state. For example after a run how long does it take you to catch your breath and finally breathe normally?
3. Enlarges ventricular volume, which means your stroke volume increases. Higher stroke volume means more blood is being pumped per minute. This is good because your heart’s workload decreases since more blood is being pumped.