Chris Pratt was impotent and depressed at 300 pounds

Chris Pratt was unhappy at his heaviest on Parks and Recreation.

The 35-year-old actor discussed his weight in an interview for the July issue of Men's Health U.K.. Pratt volunteered to gain weight to portray doofy guitarist Andy Dwyer on the NBC sitcom, and weighed nearly 300 pounds in 2013.

"I saw myself in an episode [of Parks and Rec] and in the matter of two moments very close together, I thought, 'Oh my God, I'm getting fat,'" he recalled. "And then almost immediately I did something else and I thought, 'Holy crap, I've never seen myself funnier.' And I put the two together.'"

"I'd gone back and forth, lost weight for Moneyball, got fat again, then trimmed down for Zero Dark Thirty, then gained it all back for Andy," he recalled. "That's when I saw Zero Dark Thirty and right after walking out I was like: 'I'm going to get in shape and I'm never going to be fat again.'"

Pratt was able to shed the pounds by exercising, eating healthily and cutting out alcohol. The actor admitted to feeling "impotent, fatigued [and] emotionally depressed" before he made the change, saying, "I had real health issues that were affecting me in a major way."