Dominance of Kenyan Kalenjins in middle- and long-distance running

Today the Kenyan dominance in middle-and long-distance running is so profound that it has no equivalence to in other sport in the world. Thus, the average proportion of Kenyan runners in the six all-time top 20 lists for men in the distances from 800 m to marathon including steeplechase is 55.0% (Figure 8.1).