Pacing, packing and sex-based differences in Olympic and IAAF World Championship marathons A British researcher has studied the pacing behavior of elite marathon runners at Olympia and the World Cup. He has analyzed the section times of 673 men and 549 women from 9 races.Future medal winners kept their pace from kilometers 10 to the finish.
To run at a marathon at a high level to the top, you should find competitors at the beginning of competitors that start relatively slowly and then keep the tempo to the end. The interesting analysis can be found under https://pubmed.ncbi.nlm.nih.gov/26736042/