It was discussed above that aiming for V2 Max requires training both at low and high intensity. More averagely, Zone 2 which assists in the development of the capillary network and Zone 5 which is high-intensity training with modified recovery periods are of central importance. A research from 2016 showed that water for a particular intensity level is important for everyone, but those two zones in particular are credited to gaining the efficiency of the EU cardiovascular system to access oxygen.