12-hour ultra-marathons - Increasing worldwide participation and dominance of Europeans In the ultramarathon there are different types of runs.In addition to the runs that are limited after distance (100 kilometers, 100 miles), there are also runs that are limited after time as the 12-hour run.We examined the trend of the participants from the period from 1981 to 2010. Over time, most runners from the US participated, followed by runners from Germany and France.
Runners from Europe achieved the best services, whereby the runners from Russia, Germany and Japan were most miles. The detailed work can be found under [https://www.jhse.ua.es/article/view/2013-v8-n4-12-hour-ultra-marathons-increasing-worldwide-Prarticipation-and-dominance-of-Europeans] (https://www.jhse.ua.es/article/view/2013-v8-n4-12-hour-Ultra-marathons-increaSing-WorldWide-Prarticipation-and-dominance-of-europeans “https: /www.jhse.ua.es/article/view/2013-v8-n4-12-hour-Ultra-marathons-increaSing-WorldWide-Participation-and-dominance-of-europeans”)