Wrestling is a sport in which two opponents attempt to control the other without the use of striking.

Wrestling has evolved into many different styles and forms, ranging from world-wide, commercialised stadium events to less publicized, local amateur competitions. Generally, two unarmed fighters compete against each other for each contest.

According to the International Federation of Associated Wrestling Styles (FILA), the governing body of international amateur wrestling, the four main forms of amateur competitive wrestling practiced internationally today are Greco-Roman wrestling, Freestyle wrestling, Judo wrestling and Sambo(martial art wrestling)

http://www.youtube.com/watch?v=JsVqLP_HCVc

Modern-day professional wrestling has traces back in early traveling carnivals, where showmen would challenge local spectators to compete with them in a ring. They would most commonly offer any prizes to any man, or woman, for that matter, who could beat them. Also, the carnival would often place one of its showmen in the audience to answer the challenge, and the two would provide a predetermined spectacle with the intent of providing an entertaining show for the spectators.

The United States, Mexico (Lucha Libre) and Japan (Puroresu) have garnered the greatest percentage of spectator commercialism under the “professional” label.