Olympic triathlon champion Alex Yee is no stranger to grueling endurance, but his latest venture—a debut marathon on home soil—presents a fresh and formidable challenge. Set to line up for the 2025 London Marathon, Yee isn’t just showing up to compete; he’s aiming to prove he belongs among Britain’s distance-running elite.
Known for his blistering finishing kick and Olympic pedigree in triathlon, Yee brings a rare combination of speed and stamina to the marathon scene. With a personal best of 27:51 over 10,000 meters on the track and a string of triathlon victories, the 26-year-old has long hinted at his potential over the marathon distance.
But tackling 42.2 kilometers is an entirely different beast—even for someone of Yee’s caliber. And he knows it.
Rather than abandoning his triathlon roots entirely, Yee has taken a hybrid approach to marathon preparation. His training includes high-volume running weeks—some eclipsing 100 miles—as well as regular swimming and cycling sessions to maintain cardiovascular fitness without the added impact on his joints.
“I’m not trying to reinvent the wheel,” Yee explained in a recent interview. “I’m just trying to be smart—add mileage progressively, stay healthy, and bring some of the cross-training principles I’ve used for years into this new challenge.”
Working closely with his coach and support team, Yee has fine-tuned his training using lactate testing, VO2 max assessments, and wearable tech to monitor recovery and performance trends. He’s also been spotted doing long runs with established marathoners, learning pacing strategies and nutrition techniques crucial for race day success.
To help bridge the gap, Yee has spent time training with seasoned British marathoners, including insights from Sir Mo Farah’s former training group. He's also sought advice from the likes of Callum Hawkins and Emile Cairess—athletes who have made the leap from track to road successfully.
“It’s humbling,” Yee admits. “I might be used to Olympic distance triathlons, but a marathon is something else. I’m a student again.”
The London Marathon holds special meaning for Yee—not just as a local boy from Lewisham, but as a lifelong fan of the event. His goal? A sub-2:10 finish and a statement that he’s not just a triathlete dabbling in marathons—but a serious contender.
“I want to do it justice,” Yee says. “This isn’t a one-off. I see the marathon as part of my future.”
With the eyes of the running world on him, Alex Yee’s marathon debut will be one of the most anticipated storylines of this year’s London Marathon. Whether he finishes among the elites or uses it as a springboard for future success, one thing’s certain—he’s in it for the long run.
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