I have a trainer, says Walker, whose credits include playing the title role inBloody Bloody Andrew Jackson.

This guy, Rich Barretta sounds like a trainer doesnt he?

Hes a guy that Ive worked with for years.

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Credit: Jeremy Daniel

He helps me not only be healthy but [he] kind of sculpts people.

Its one of the fun aspects of being an actor.

Its grueling, but if youre going to take it seriously, its part of the job.

Basically, I show up and he kicks my ass.

We were talking about, Whats scary?

What muscles are scary?

And that was what we were going for: prison-ripped.

I dont know if Ive achieved it but thats what were going for.

Everyone in the cast has had to do what Ive done.

you’re able to see the trailer forAmerican Psychobelow.

A version of this story originally appeared inEntertainment Weeklyissue #1411-1412, on newsstands now or availablehere.