I know he did a lot of interval training. But what kind of training prepared him to win the gold medal in the marathon after winning the 5,000 meters and 10,000 meters? As far as I know the farthest he ever ran in training was 20km. Another thing. I'm looking at a picture of him and the shoes he wore. They don't look like racing flats. They look more like track shoes without spikes. His winning time (2:23) wasn't that fast by today's standards, but it was still an impressive feat.