Durban - Allegations of cheating in 2013 Comrades marathon, uncovered by statistician and Comrades runner Mark Dowdeswell, take time to prove, a KwaZulu-Natal Athletics (KZNA) spokesman said on Wednesday.
Dowdeswell who identified 23 runners who had missed timing mats along the route in the 2013 race, highlighted a case where a runner had missed two mats in the second half of the race.
Athletes aspired to run the second half of the marathon in a faster time than the first half to get what is known as a negative split.
In 1980, Rosie Ruiz not only took the New York underground to the finish of the marathon, but she used that race time to qualify for the Boston Marathon. She then cheated in Boston race to win the woman's race in 2:31:56.
In 1998, Herman Matthee caught a taxi to join the down race on Fields Hill 24km from the end and finish in seventh place.
A year later, Sergio Motsoeneng, who finished ninth, was disqualified and banned from the Comrades for five years after it was discovered he had run the race in relay with his twin brother, 19-year-old Fika Motsoeneng.