Chinese Fitness Influencer Loses Sponsorship After Bicycle Cheat Exposed at Berlin Marathon

A Chinese fitness influencer has been stripped of a major sponsorship deal and disqualified from the Berlin Marathon after she was caught riding a bicycle during the race, in a scandal that has reignited debate about cheating and credibility within the running community.

Sun Yuanyuan, who goes by the handle Abeeeer on Chinese social media, had publicly celebrated achieving a personal best at the German marathon, which took place at the end of September. Her performance, however, was called into question when a photo surfaced appearing to show her on the back of a bicycle being pedalled by another person somewhere between the 35-kilometre and 40-kilometre marks of the 42.2-kilometre course.

The image was published by an Instagram page that devotes itself to monitoring inaccurate or misleading race times posted by influencers. The account, which calls itself the Official Marathon Time Integrity Unit, or OMTIU, also shared a grid of Sun's split times — the recorded durations for each five-kilometre segment of the race — which appeared to show an unexplained acceleration during the same stretch of the course where she was allegedly on the bike.

Confronted with the evidence, Sun issued a public apology on Rednote, the Chinese social media platform where she has amassed 520,000 followers. In the statement, which was subsequently shared by OMTIU, she acknowledged that she had broken the rules and offered no defence for her conduct.

"I won't make any excuses for this behaviour," she wrote, according to the post. She explained that she had been feeling physically unwell during the race but stressed that this did not justify her actions. "I was feeling physically unwell on the course, [but] that is absolutely not an excuse for breaking the rules," she said.

Sun went further in her apology, conceding that her attempt to take a shortcut had undermined the principles that underpin competitive running. "My attempt to take a shortcut was disrespectful to the fairness of the competition and the spirit of the marathon," she wrote. She also admitted that she had "deliberately concealed" what she had done, adding: "I feel deeply guilty about this."

The consequences were swift. Brooks, the American running shoe company that had sponsored Sun, confirmed to BBC News that it had severed ties with her. In a statement provided to the broadcaster, the company said: "Brooks believes running should be grounded in integrity, fairness, and respect for competition. After verifying the facts, Brooks China terminated its relationship with the individual and publicly addressed the matter." The company's decision underscores the commercial risk that brands face when the athletes they endorse become embroiled in integrity scandals, particularly in a sport where authenticity is central to the relationship between runners and the products they use.

Marathon organisers have also taken action, disqualifying Sun's finish time. The Berlin Marathon has been contacted by BBC News for comment, but no response had been published at the time of writing. The disqualification means that her result will no longer appear in official records, a significant blow for an influencer whose personal brand depends heavily on verifiable athletic achievements.

The case has drawn attention to OMTIU, the account responsible for exposing Sun's actions. The page describes its purpose as highlighting what it calls "the growing trend of GPS-based fabrication, selective Strava displays and false PR claims" among marathon runners, with a particular focus on fitness influencers who rely on social media for their livelihoods. Strava, a popular fitness tracking application, allows users to upload activity data, and discrepancies in that data are often the first clue that something is amiss.

OMTIU's stated mission is explicit about its goals. "We exist to protect the integrity of the sport by ensuring that the times athletes share publicly reflect the times they actually ran," the page's mission statement reads. Yet its Instagram bio describes the account as "satire," a detail that adds a layer of ambiguity to its role in this affair. The apparent contradiction — pursuing a serious integrity mission while labelling the enterprise as satire — reflects the murky ethical territory that social media watchdog accounts occupy when they expose misconduct in a largely self-regulated sporting space.

The incident also raises broader questions about the pressures placed on fitness influencers, who often build substantial followings by documenting their training, races and personal bests. The drive to produce impressive results, combined with the commercial incentives of sponsorship deals, can create a temptation to cut corners. In Sun's case, the shortcut was literal rather than metaphorical.

For marathon organisers, the episode highlights the difficulty of policing large-scale events where tens of thousands of participants share the roads and official timing mats are the primary means of verification. While elite athletes are subjected to rigorous scrutiny, including drug testing and timing checks, the vast majority of recreational runners pass through the course with far less oversight. That gap is precisely what accounts such as OMTIU seek to exploit — or, depending on one's view, to close.

The affair is unlikely to be the last of its kind. As marathon running continues to grow in popularity, particularly in Asia, the intersection of sport, social media and commerce will keep generating cases in which the desire for recognition collides with the rules of fair competition. Sun's apology and the swift termination of her sponsorship serve as a cautionary tale: in a community that prizes authenticity, the exposure of a shortcut can cost more than a finish time.