England has secured a spot in the World Cup round of 16, setting up a crucial match against Mexico this Sunday at 1 a.
m. Monday BST.
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However, the team faces a formidable environmental challenge alongside their opponents: extreme altitude.
Playing at the Estadio Azteca in Mexico City positions the athletes 2,240 meters above sea level.
This specific environment significantly alters physical performance, making high-speed running more difficult and slowing down recovery times.
Physiological Impact of High Altitude
Experts warn that the atmospheric conditions will force distinct physiological adjustments.
Dr. Neil Maxwell, an applied environmental physiology expert from the University of Brighton, explained that the percentage of oxygen remains identical to sea level, but lower barometric pressure changes how the body processes it.
"Therefore, the kind of forcing function of that pressure, pushing the oxygen into your red blood cells, is reduced.
And that's the physiological challenge – they're not getting the oxygen into the red blood cells," Maxwell said.
"And because of that, their heart is having to beat quicker, they're having to ventilate quicker to try and compensate.
But obviously, there's a limit to how much they can do that."
This physiological burden accumulates rapidly during a standard 90-minute football match.
Maxwell noted that the intense fatigue players typically experience during the final quarter of a game will likely hit them during the first half.
He added that the conditions accelerate muscle energy depletion and increase sweat production.
