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Speaking from personal experience of playing physical sports in the Rockies much higher than Mexico City, the altitude differential is overrated.
There are thousands of scientific papers that would dispute your anecdotal opinion. Considering there is major sports teams, and individual athletes who take themselves off to locations such as Eldoret in Kenya and Flagstaff in USA for this very purpose.
 
Speaking from personal experience of playing physical sports in the Rockies much higher than Mexico City, the altitude differential is overrated.
Y'all of Sherpa decent by any chance? Did great-grandpa guide Edmund Hilary up Mt. Everest?

I'm a lowlander. Just being in the hill country makes me a bit wheezy. Mountains? Better pack a few extra O2 tanks.😉
 
Speaking from personal experience of playing physical sports in the Rockies much higher than Mexico City, the altitude differential is overrated.

If you have had a few days to acclimatize. If you come in the day before and have to run for 90 minutes at world cup football level, it’s not the same.
 
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