What in the world do a night club and the training scale have in common?

Proper dressage is the systematic gymnastic training of the horse which develops the horse for optimal athleticism and obedience to its rider.  After all, dressage is very old, and dates back to when horses were used as cavalry - riders literally put their lives in the hands of their horses and needed to know not only would their horse have enough stamina for battle, but that he would respond precisely to the riders aids and it was literally a matter of life and death.  For the modern rider, it