Chinese Marathon Runner Dropped by Sponsor After Footage Appears to Show Her Riding a Bike Mid-Race

Chinese runner Sun Yuanyuan has been dropped by a sponsor after footage emerged that appeared to show her riding on the back of another person's bicycle during a portion of the Berlin Marathon, according to the BBC.

The images, which circulated following the race, seemed to show Sun off her own two feet for part of the course, raising questions about how she completed that section of the event. The BBC reported that the sponsor ended its relationship with the runner in response to the footage.

Marathon organizers generally prohibit runners from receiving outside transportation or assistance during a race, since results are based on competitors covering the full certified course under their own power. Allegations of shortcuts, course-cutting, or accepting unauthorized help have periodically surfaced in long-distance running, often triggering scrutiny from race officials, sponsors, and anti-cheating watchdogs within the sport.

It was not immediately clear from available reporting what explanation, if any, Sun or her team offered for the footage, or whether Berlin Marathon organizers have opened a formal review of her result. The BBC's report did not detail further comment from the runner at the time of publication.

The episode adds to a recurring pattern in competitive marathon running, where phone and spectator footage has increasingly been used to flag irregularities in runners' performances after the fact.