

In the past two decades, the field of ultra-endurance events defined as performance exceeding 6 h has widened to a new arena in the sport of long-distance performances in particular ultra-running and ultra-triathlon. Master ultramarathoners can achieve a high level of performance in ultramarathons greater than 200 km under extreme conditions. Women will not outrun men in both Badwater and Spartathlon races. These results suggest that for both Badwater and Spartathlon, (a) female participation increased, (b) the fastest finishers were approximately 40 to 45 years, and (c) the sex difference was at approximately 20%. The sex difference remained unchanged at 19.6% ± 2.5% ( p > 0.05). In Spartathlon, the running speed was stable over time at 10.8 ± 0.7 km/h for men and 8.7 ± 0.5 km/h for women ( p > 0.05). The running speed increased from 7.9 ± 0.7 to 8.7 ± 0.6 km/h ( p 0.05). In Badwater, women and men became faster over the years. In Spartathlon, the age was unchanged at 39.7 ± 2.4 years for men and 44.6 ± 3.2 years for women ( p > 0.05). Over the years, the age of the annual five fastest men decreased in Badwater from 42.4 ± 4.2 to 39.8 ± 5.7 years ( p 0.05). There was a significant increase in female participation in Badwater from 18.4% to 19.1% ( p 0.05). Women accounted on average for 21.5% ± 6.9% in Badwater and 10.8% ± 2.3% in Spartathlon. The number of female and male finishes increased in Badwater and Spartathlon. Age of peak performance and sex difference in running speed were investigated during the studied period. Running speed and age of male and female finishers in Badwater and Spartathlon were analyzed from 2000 to 2012. The aim of the present study was to compare the trends in participation, performance and age of finishers in ‘Badwater’ and ‘Spartathlon’ as two of the toughest ultramarathons in the world of more than 200 km of distance.
