Slow Horses’ Christopher Chung Says He Still Works as a Personal Trainer

Christopher Chung is keeping his side gigs while continuing to act. 

The 37-year-old actor told The New York Times that he still works as a personal trainer, despite starring in the Emmy-winning Apple TV+ series Slow Horses.

Chu works as a trainer at Fred’s Gym in London and is loyal to a group of clients, with no plans to leave. 

Slow Horses is based on Mick Herron’s best-selling Slough House book series. The author, 62, told The Times that having a fit actor like Chung portray the nerdy I.T. guy, Roddy Ho, allows the character to be the “Roddy that Roddy always wanted to be.”

Chung refuted the claim that an I.T. guy can’t look like him.

“There are people like this, that are kind of geeky, nerdy, really good at computers, but that are in incredible physical shape,” he said, jokingly adding, “I’ll send you some videos.”

“He’s having the time of his life,” Herron said of Chung. “He’s terrific and audiences love him.”

In June, Chung opened up to Body and Soul about balancing both jobs and their respective schedules. He noted that he works out five to six times a week, “with four days of lifting and two days of conditioning work.” 

“I feel funny in my body and mind if I don’t get those workouts in or I’ve got a lot of either pent-up anxiety, that I just need to get out,” he said.

“I’ve had to really learn how to have a new relationship with my body, and how that kind of plays into my filming schedule,” he added.

“I make sure that my nutrition is on point throughout the shoot weeks and I can’t go out and slam the beers and eat junk anymore,” he said. “I used to use food as a kind of mood leveller and binge, then I would punish myself by going to the gym and pushing as hard as I can.”

“I was motivated by aesthetics [when I was 25] whereas now I must be functional and make sure that my body is robust enough to do whatever is required of me on set, still hoping that the by-product is an aesthetic physique,” he said.

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Slow Horses season 5 airs weekly on Wednesdays on Apple TV+ until the series finale on Oct. 29. Series creator Will Smith won the Emmy for Outstanding Writing on a Drama Series in 2024, while Adam Randall won Outstanding Directing for a Drama Series at the 2025 Emmys in September.