Toni Reavis has a very interesting piece up this week on his site tonireavis.com where he shares an email exchange with Bill Rodgers.http://tonireavis.com/2015/01/04/bill-rodgers-speaking-of-altitude/#more-12619
Then Toni Reavis replied:
I never really thought all that much about 'born at altitude'. I always just assumed 'genetics'. Or is it both? If a Kenyan baby is born at sea level, will it not be as good as one born at altitude? I wonder what Ross Tucker or David Epstein would say about that.