You're misunderstanding me. I didn't say it's
just about genetics. I said at an elite level, race is absolutely a
limiting factor. No matter how hard the Chinaman trains in long distance running for example, he will never beat the Kalenjin. Other races can try and adapt themselves by training hard, but there is a limit to what training can do. That difference is what makes the elite.
If you think that a Chinese man can give himself the same musle fibers, fat composition, bone proportions/density, RBC count as a Kalenjin long distance runner or Jamaican sprinter by simply training smarter, harder, and more determined (
even though the Chinese spend billions on recruiting from age 4-6 and training in Olympic schools, way more than Kenya or Jamaica spends ), this must be the Exercise Science book you're reading: