Professional wrestling, often referred to as pro wrestling, or simply, wrestling, is a form of athletic theater centered around mock combat, with the premise that its performers are competitive wrestlers. The legitimate sport of wrestling has never been popular enough in the United States to sustain a professional scene because the action is considered too slow-paced. In the late 19th century, wrestlers dealt with this by quietly fixing their matches so that they could display more entertaining action. Through improvisation and choreography, they could perform more spectacular moves that rarely occurred in a real wrestling match, and thus managed to draw sustainable audiences.