It's no secret that Chris Pratt slimmed down significantly before achieving movie star status thanks to roles in "Guardians of the Galaxy" and "Jurassic World," but can he sustain it?

Pratt, looking in great shape for the July/August cover of "Men's Health," jokes that he might be heading that way.

"I can tell that people are motivated by my transformations, and that feels really good," the 36-year-old actor tells the magazine. "But everyone should know when the movie star stuff is over, I might go back to being the fat guy. My wife [Anna Faris] wants a pizza oven -- she's going to learn how to bake bread, and I'm going to eat it."

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Pratt knows that depriving yourself too much isn’t the ideal way to live life.

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"I love the health benefits of exercising, and I have a kid now. By exercising, you really can add 20, 30 years to your life," he says. "But you gotta live too, so hopefully I'll find a nice balance."

But first, he reveals he wants to lose even more weight for his next role, a remake of the iconic western "The Magnificent Seven," opposite Denzel Washington. The former "Parks and Recreation" star says his goal is to drop 20 more pounds by cutting back on calories as filming approaches, and keeping up with the intense exercise that completing a triathlon takes. (In April, he completed a Half Ironman triathlon in Haines City, Fla., which consisted of a 1.2-mile swim, a 56-mile bike ride and a 13.1-mile run.)

"[My wife] loves me very much, but this can be frustrating for her," he admits about the 10 long workouts a week it takes to get triathlon-ready. "Neither of us really knew what I was getting into."

Pratt's dedication to working out has obviously paid off.

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