Participation and Performance Trends in Triple Iron Ultra-triathlon - a Cross-sectional and Longitudinal Data Analysis We have studied the development of participation and performance as well as the gender differences of all Triple Iron Ultratriardlons (11.4 km Swimming, 540 km cycling and 126.6 km) from the first race in 1988 to 2011. During this period, 824 men and 80 women have seen such a competition.Over the years, men became faster, the women, however, slower. The percentage difference in the performance of the sexes for the fastest athletes increased significantly from 10% in 1992 to 42% in 2011. The summary can be found under https://pubmed.ncbi.nlm.nih.gov/23012633/