The 49ers are shaking up their schedule priorto their match versus the Cardinals on Monday Night Football in Mexico City.
Estadio Azteca, where the 49ers and Cardinals will face off, sits more than 7,200 feet above sea level. To prepare their bodies for elevation, the 49ers are takingatrip to Denver (5,279 feet) to start adapting to the thinner air.
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San Francisco will travel out Tuesday and invest all week i