Workout Plans : The Personal Trainer of Superheroes | Duffy Gaver 9 years ago 1.7k Views Share Share on PinterestShare on FacebookShare on Twitter The Personal Trainer of Superheroes | Duffy Gaver Video Description Superheroes need a super trainer. Chris Hemsworth and Scar Johansson called on Duffy Gaver, no-nonsense bad@ss and former Navy SEAL. He turned them … 19 shares