Celebrity trainer Jason Walsh explains how he gets actors in shape for movies. Jason breaks down how he trained Matt Damon for “Elysium,” Jennifer Aniston for “We’re the Millers,” Miles Teller for “Only the Brave,” Chloë Grace Moretz for “Shadow in the Cloud,” and Jimmy Chin for “Free Solo.”

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How a Celebrity Trainer Got Matt Damon, Jennifer Aniston & More in Shape | Vanity Fair