High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! In many styles of wrestling, opponents are matched based on weight (mass). Currently, men's freestyle and Greco-Roman wrestling is divided into four main age categories internationally: schoolboys, cadets, juniors, and seniors. Wrestling is an ancient martial art that uses grappling type techniques such as clinch fighting, throws and takedowns, joint locks, pins and other grappling holds. A wrestling bout is a physical competition, between two (oocasioally more) competitors or sparing partners, who attempt to gain and maintain a superior position.