Go ahead and look up “Wolverine then and now,” and you’ll see the split screen shots Hugh Jackman is talking about. The difference in his physique is startling. Clearly back then, the superhero body expectation hadn’t been firmly established yet. Now, save a few actors that can get away with it, most superhero actors have put on muscle.
Article source: https://www.cinemablend.com/news/2549108/hugh-jackman-recalls-having-no-idea-how-long-it-would-take-him-to-get-in-shape-to-play-wolverine