Don't assume to know -- the story about Daniel Komen is that he never really enjoed running, for him it was a way to make money. Once he made his fortune, there wasn't much point to keep up the hard training and he was done. Differejt strokes for different folks.
Ancient Art of Dim Mak wrote:
But surely such a fast runner would enjoy his running enough to want to train and use his talent?
And Renato has published all the significant workouts Kemboi did during that season -- they're somewhere around here.