Age-related Participation and Performance Trends of Children and Adolescents in Ultramarathon Running Trends of participation and performance as well as the performance differences between the sexes in ultra-run were well described in the adult population. For adolescent ultramarathon runners, however, there were less information about such trends. The aim of the present study was to investigate the age-related participation and the performance trends of children and adolescents ultramarathon runners.Data from runners under 19 years, which participated from 1960 to 2018 at distance-limited ultramarathons of 50 km, 100 km, 50 miles and 100 miles, were analyzed.During this time, the number of participants increased, especially in boys, most runners came from Europe, and the 50- and 100 km racetracks were most popular. Overall, male runners were faster than female runners, except in the case of European and Oceanic origin, where girls were faster over the 50 km race. The fastest male runners came from Africa and the fastest girls from Oceania, and the average running speed has fallen sharply for both sexes over the calendar years.
In summary, this study was the first to describe the details of trends of participation and performance in adolescent ultramarathon runners participating in distance-limited ultramarathons. The study can be found under https://pubmed.ncbi.nlm.nih.gov/32573266/