We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
I run in Prospect Park in Brooklyn. There are endless aging yuppies running in their expensive running shoes. Every so often you see a squat, Andean looking man (different men at different times) who probably works as a restaurant kitchen worker, in cheap shoes, run by twice as fast as the yuppies, and steady. I have often wondered about the culture that produces these people. Thanks for a fascinating article.
I think the question is wrong. There isn't a design. Yet. Science is getting pretty close to routinely altering genes.
From personal observation I remember the people in Boliva and Peru as having large chests which would correspond to larger lungs. And I believe their blood carries more oxygen too.
That may have evolved from centuries of living in the Andes at high altitudes. More oxygen, more vitality, more chance of living to reproduce.
When such a person is at lower altitude they will still have an advantage in strenuous and prolonged tasks such as distance running. OTOH they may have also evolved some disadvantages such as relatively shorter legs.
Champion athletes definitely train at high altitudes before contests which will be held in high altitudes.
I vaguely remember accounts of natives in Mexico running deer to exhaustion or even death. However man has the advantage of relays, one hunter doesn't have to do all the running. And game will circle, the pursuer covers less ground than the prey.
There is a growing body of evidence to support the theory that early man came down from the trees and began running down game in persistence hunts. The higher calorie density of the game provided an advantage to these early hunter primates, which in turn supported development of larger brains and the evolution of modern man.