Age group performances in 100 km and 100 miles ultra-marathons So far, it is known that age-class athletes have improved over the years.In the area of ultra-sail, the 100 km run in Biel and over 100 miles in the US, Western States Endurance Run were examined. A problem with previous work is that only 1 event has been analyzed and that only linear regressions were used.We now examined the trend for age class runners for every 100 km and 100 miles of 1971 to 2013. It showed that the runners in the younger to medieval groups (25-35 to 50-65 years) have achieved their zenith because the course of the running speed was non-linear over the years.
On the other hand, runners in recent (under 25-35 years) and older (over 50-65 years) age groups still have a potential for development potential, because their running speed has developed linearly over the years. The whole work can be found under https://springerplus.springeropen.com/articles/10.1186/2193-1801-3-331