Rio 2016
128 days
Pyeongchang 2018
-425 days
Tokyo 2020
-1321 days
When Mexico City was awarded the games in 1968 a cry of alarm went out from doctors, coaches and athletes, who knew that in the Mexican capital, which is perched on a plateau at 2240 m altitude, oxygen is scarce. The oxygen level is one third lower there than it is at sea level, and any effort lasting more than a minute would tax athletes heavily.This was shown, for instance, in the 10,000 m race which was won by Temu, a runner from the high plateaux. His time was very much better than that of any achieved at the time.
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