Marathoners are getting faster — that’s no secret. Here’s the progression of the fastest men’s marathon in each year between 1969 and 2010.
The average data also shows a few inflection points where the rate of improvement has changed. There was rapid improvement until 1983, then a leveling off until about 1997; decrease again until 2003, then a little hitch for a few years, and now steady decrease again.
So what explains the changes? We can speculate about the role of money, science, and training… But as Amby Burfoot pointed out in his take on this study, it’s hard to get away from this stat:
In 1997, East Africans nabbed just 29 percent of the top 200 times. For 2010, the corresponding figure was 84 percent.
One other interesting nugget: during this time period, the top time improved by about 5 seconds per year, while the average of the top 200 improved by about 10 seconds per year. So this means that (a) competitive depth is improving, and (b) in another 50 years or so, the 100th ranked marathoner in the world will be faster than the top-ranked marathoner of that year.