Thus forcing the cheerleader to actually make adjustments in their balance, force and speed as they are wildly flipping their body in all directions at some 10 to 20 miles per hour. In addition, once the adjustment has been made there is no way that the cheerleader can predict what type of landing surface the next point of impact will have. This also is frequently executed while there are a myriad of infinitely variable distractions, crowds, music, other cheerleaders nearby, etc. By definition this classifies the cheerleader as an expert in gymnastics. That is, to able to perform immediately, with a very high degree of skill and at a moment's notice.
Cheerleaders are masters of gymnastics.
The numbers of dance routines that a cheerleader must know well are many. After all, cheerleaders are artists in the communication of enthusiasm. They know that if they provide a variety of movements this will further encourage the crowd to participate. This is evidenced by simply watching them. I myself have counted over 100 different dance routines during one single game.