Sergio Oliva  is a bodybuilder known as "The Myth". This sobriquet was given to him by bodybuilder/writer Rick Wayne. Wayne had begun calling Oliva "The Myth" "(because everyone who saw him at the 1967 Montreal World's Fair said he was "Just unbelievable").

In 1963 Oliva moved to Chicago, Illinois. There he worked at a local steel mill and began working out at the Duncan YMCA. Working 10-12 hour days at the steel mill and putting in another 2.5–3 hours at the gym gave Oliva very little time for anything else. Soon the bodybuilding grapevine was abuzz with gossip about a Cuban powerhouse who lifted more than any of the local Olympic champs. Oliva won his first bodybuilding competition the Mr.

 Chicagoland contest in 1963. Then he was successful again at the Mr. Illinois in 1964 but he lost in 1965 at the AAU Jr. Mr. America winning 2nd place even though he won the trophy for "Most Muscular". In 1966, he won the AAU Jr. Mr. America and again he claimed the trophy for "Most Muscular". He then joined the International Federation of BodyBuilders IFBB in which he won both the professional Mr. World and Mr. Universe Contests. In 1967 he won the prestigious Mr. Olympia contest, making him the undisputed world champion of bodybuilding.