Jason Arday, a former Cambridge University professor, has resigned from his position following a series of allegations concerning plagiarism and inconsistencies in his personal narrative, including claims about running marathons with a severe leg injury.

Arday, 41, who was previously celebrated as the university's youngest Black professor, announced his resignation in a letter to colleagues, stating that the scrutiny had taken a profound toll on him and his family. He described the experience as going "far beyond scholarly disagreement."

Questions have been raised about his forthcoming autobiography, "Great And Unfortunate Things," which details a fundraising challenge where he completed 30 marathons in 35 days after only a few months of training. In the book, Arday recounts collapsing on the 21st day of the challenge, later discovering a hairline fracture in his right fibula. He claims the injury caused his leg to swell to twice its size and that he experienced significant pain for the subsequent nine marathons, often taking well over five hours to complete each one.

However, photographic evidence from the finish line of one marathon at Piccadilly Circus in the summer of 2010 appears to contradict his account. Photos show Arday with legs that do not appear significantly swollen, and the crowd of onlookers is estimated at around 50 people, rather than the "two or three thousand" he described in his memoir. The image places him near the Shaftesbury Memorial Fountain, also known as Eros, with a banner for Ripley's Believe It Or Not visible.

This scrutiny follows earlier revelations that Arday allegedly presented a quote from tennis legend Rafael Nadal as his own in an early draft of his memoir. Further questions arose regarding his claims of holding academic posts at various universities, which some institutions have disputed.

Cambridge University initially defended Arday against what it called a "vile campaign to undermine his credibility." However, after the extent of the disputed claims became public, the university announced it was taking action, leading to Arday's resignation.

In his resignation letter, Arday stated, "This decision should not be interpreted as a loss of faith in scholarship or in the values that first brought me to Cambridge. Nor should it be mistaken for an acceptance of the narratives that have surrounded me. It is simply the decision of someone who has reached the limits of what any person should reasonably be expected to endure."

Arday has previously spoken out about the criticism, telling the Daily Mail that it had "destroyed his life" and that unnamed adversaries had spent over three years attempting to ruin his reputation. He expressed frustration that the "narrative is already out there" and that people are not interested in his side of the story.