pv runner wrote:
Your analysis has a problem. If the progression was entirely or almost entirely PED-driven, then the people breaking the records world have come largely from many countries and mostly form the countries that had more and better access to PEDs (Western Europe and North America). But instead, with one exception, the WR breakers came entirely from two high-altitude African countries. So Kenya and Ethiopia had the only guys doing EPO? Another explanation for the 90s progression is that these were two poor countries with huge untouched talent that poured runners into the 10000 to earn, what was to them, huge money. There were just not that large a number of Kenyans and Ethiopians training seriously and running at big meets before the 90s. So of course there was a sharp improvement curve at the start of the phenomenon (90s,)and the rate of WR progression inevitably leveled off (as the number of runners from those countries ceased increasing at as high a rate), combined with the fact that (as mentioned above) more of the money shifted away from the 10K to the marathon, combined with a general decline in the number of big track meets (less opportunity, less money, less WRs). Put big money back into the 100000 and you will see more records. I am not saying EOP does not exist and did not have any impact, but it is not the only thing that happened, and your analysis is deeply flawed.
This is an explanation that uninformed people repeat over and over again. But they don't realize that when East Africans started to "rule" distance running around 1990, they didn't run much faster than the generation of runners before. In fact, in the 800/1500 m they were running SLOWER times! It was only after the introduction of EPO in 1995 that their times exploded to unseen heights in all distances.