dream world lives on wrote:
None of the runners you mentioned trained anywhere remotely like the Kenyan marathoners of today.
While training methods have obviously been refined over the decades, it's ridiculous to just assume that Kenyans are training so much better today than North Americans were in the 1970s.
The fact is that the population of certain tribes in East Africa are far more likely to have the genetic/biomechanical traits that are IDEAL for distance running: Legs that make up a huge proportion of their total height; narrow hips; skinny ankles; and small frames.
Obviously the best Kenyan marathoners *also* train really hard and have benefited from the continued advancements in exercise science. But times have been going down not just because of "evolving" training methods - it's also in large part due to the fact that the East Africans started to be exposed to world-class competitions.
Then, when it became clear that successful runners could make a small (or large) fortune by Kenyan standards, all of the country's athletic talent started being directed towards distance running, in the same way that all of Jamaica's athletic talent has historically been directed towards sprinting. In the US, talented athletes get diverted into all sorts of other sports, largely because they're more lucrative.
Anyway, yeah, don't ignore the fact that many East Africans are just simply built for distance running, and that they weren't competing much back in the day. Had they done the same training that was available at the time, they would have almost certainly posted times a couple minutes faster.