One hundred and fifty years of sprint and distance running - Past trends and future prospects. Proof, the mileage has been significantly improved for sprint and longer running routes in recent decades. An Italian group has been examined by various running competitions as the performance in 2100 will have developed. It is expected that women will be 10-20% slower than the men, the border of 9.50 sec. Over 100 m will be underbuilt only at the end of this century and several records of medium and long distances are broken within the next two to three decades.
Whether the marathon can be used under 2 hours by the end of the current century remains questionable. The entire analysis can be found under https://pubmed.ncbi.nlm.nih.gov/26088705/