<P> Korykos were the equivalent to modern punching bags . They were used for practice in the Palaestra and were filled with sand, flour, or millet . They were commonly depicted in art depicting boxing of the time . </P> <P> The currently accepted rules of ancient Greek boxing are based on historical references and images . Because of the few intact sources and references to the sport, the rules can only be inferred . </P> <Ul> <Li> No holds or wrestling </Li> <Li> Any type of blow with the hand was allowed but no gouging with the fingers </Li> <Li> No ring was used </Li> <Li> There were no rounds or time limits </Li> <Li> Victory was decided when one fighter gave up or was incapacitated </Li> <Li> No weight - classes, opponents were selected by chance </Li> <Li> Judges enforced the rules by beating offenders with a switch or whip </Li> <Li> Fighters could opt to exchange blows undefended if the fight lasted too long </Li> </Ul> <Li> No holds or wrestling </Li>

Who invented the sport of boxing according to mythology