Charles Atlas (1892-1972; born Angelo Siciliano) was a pioneering physical culture advocate and bodybuilder, who took his professional name in 1922 after the Greek hero Atlas. Atlas was best known for his bodybuilding courses (specializing in "dynamic tension"), first advertised in the 1920s. Atlas' own physique graced the ads, typically clad in leopard-patterned trunks/loincloth, and his hand signature accompanied the claims.