All physiological capacities have a limited level of development.
Once maturational growth stops there is no possibility of improving VO 2max or anaerobic capacity any further. In fact, the various physical capacities achieve their inherited limits at various times. For example, an athlete's ability to do endurance work is set in the early stages of the adolescent growth spurt. At the end of the adolescent growth spurt, anaerobic capacity is set. When conditioning programs are experienced, the physical capacities are stimulated in various amounts.