29 Dec '14, 3pm

The top runners at short(er) ultramarathons are getting younger and faster:

The shortest standard ultramarathon distance, 50 kilometers, is increasingly dominated by younger, faster runners, while much older runners continue to reign supreme at extreme distances such as 1,000 kilometers, according to an analysis of ultras run between 1969 and 2012 published in Springerplus . Swiss researchers looked at annual best times and ages of the 10 fastest performers for 50K, 100K, 200K, and 1,000K races. They found that the front of the pack has gotten much faster at the shorter events studied. At 50K, the fastest women have gone from averaging 6.5 miles per hour (mph) to 9.5 mph, and the fastest men, who used to average 8.8 mph, were covering 10.8 mph by the end of the study period. Similarly, at 100K, the fastest women went from 4.5 mph to 8 mph, while the pace increase in men was from 6.3 mph to 9.3 mph. In contrast, the top runners' speed at 200K and 1...

Full article: http://www.runnersworld.com/races/top-runners-at-short-ul...

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