This is about the stomach movements done by the "Aikido instructor" in the "Incredible Hulk" movie from 2008.

A GIF image showing this scene can be found here (the GIF is from this page).

Is this kind of stomach muscle control actually possible or is this just CGI animation?

  • If anyone is unaware, the instructor is Rickson Gracie, who was widely regarded as the best mixed martial artist on the planet during the peak of his athletic career. He is a one-in-a-million athlete, and possess core strength and flexibility that most people would probably not be genetically capable of achieving.
    – GHP
    Commented Jul 20, 2017 at 12:54

1 Answer 1


Yes. What he seems to be doing is a mix of Kapalabhati breathing and a stomach vacuum. He's mostly sucking in his stomach in such a way that it flattens. He also sucks in the sides of his stomach while pushing out the abs to make it look like he's controlling his obliques and serratus.

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