slowerthany0u_ wrote:
Running is trainable(Endurance). Sprinting is genetic (Speed). End of the story.
Not all west Africans have the type 2x muscle fiber background, some of them have the type 2a profile which makes them versatile up to 5k (Justyn Knight for example). Whites really don't have the genetic makeup to be runners (more of a swimmer or a strongman) so that's why they aren't as great runners compared to east Africans or west Africans. Not one white man has the world record for a specific event (100m-marathon is mostly Africans).
Sebastian Coe