Rocky wasn't training for a title. He was training for his soul. He was fighting to prove he wasn't a coward. The "top" of Rocky III is unique because it features a protagonist who has already won everything, realized it was hollow, and decided to become a beast anyway.
To capture the athletic look seen in the film, the training regimen focused on a combination of high-volume bodybuilding, cardiovascular conditioning, and boxing drills. Morning Sessions: Strength and Conditioning Cardiovascular Work : Morning runs were used to build endurance. Resistance Training rocky iii top