Is the highest amount of oxygen the body can utilise during high intensity training. You can build the ‘size of your engine’ through high intensity training, and essentially increase your aerobic capacity. Think short (less than 3min) intervals of very hard / high intensity intervals. These are the types of intervals that will help drive up your aerobic capacity / VO2 Max. The polar opposite to aerobic endurance / low stress endurance / resilience work.
Aerobic capacity, aerobic power, functional capacity, functional aerobic capacity, maximal functional capacity, cardiovascular fitness, maximal oxygen intake, and maximal oxygen uptake are terms that are often used interchangeably.
*Note this type of training should only safely be incorporated after a sound endurance base has been established.