Analysis of performance and age of the fastest 100-mile ultra-marathoners worldwide If the aspect of the age of the best performance was examined, individual competitions were usually analyzed over time. We have analyzed the performance of 35,956 finishers of 100 miles runs between 1998 and 2011.Men like women were faster over the years, but the age of the best performance did not change.
The fastest women were 39 years old, the fastest men around 37 years. The whole work can be found under https://www.ncbi.nlm.nih.gov/pmc/articles/pmc3654294/