What many are describing here is a track focus type program. Much more intensity with less long distance aerobic riding. Many track specialists do very well in shorter road type events such as criterium and masters racing. These do not require that deep level of aerobic fitness; that ability to be on the rivet for a hour. The problem for young senior racers is that without the development of their aerobic capacity, it becomes difficult to keep developing and moving through the ranks. It is important to remember also, that the body can only go so hard for so long before it needs a rest. An example is why winning the Suisse, Italian, and French tours in a single year is such a great accomplishment.