MEXICO CITY (AP) 鈥� Heat won鈥檛 be the only environmental factor affecting players鈥� performance at the Teams playing in two of Mexico鈥檚 host cities must adapt to another challenge: altitude.
The in sits at more than 7,300 feet (2,200 meters) above sea level, while is at 5,138 feet (1,566 meters).
Visiting teams that aren鈥檛 used to those conditions may struggle with fatigue.
鈥淲e have a massive advantage as the host country because we鈥檙e playing at the Estadio Azteca with our fans and the altitude,鈥� Mexican football commissioner Mikel Arriola said. 鈥淚t is a very potent setting.鈥�
In Mexico, leveraging that advantage is seen as key to the team鈥檚 chances. It is no coincidence that deepest World Cup runs occurred on home soil.
The last time Mexico hosted the tournament, in 1986, it advanced to the quarterfinals, ultimately falling to West Germany in a penalty shootout. That match was played in , where altitude is not a factor.
Mexico plays South Africa in the World Cup opener June 11 at the Azteca 鈥� which FIFA has renamed Mexico City Stadium during the tournament 鈥攂efore facing South Korea just outside Guadalajara on June 18. It plays its last game in Mexico City on June 24 against Czechia.
Altitude won鈥檛 be a factor in the games played in the United States and Canada. The highest-altitude U.S. host city is Atlanta, at just 1,050 feet (320 meters) above sea level, while Canada鈥檚 highest venue is in Toronto, at just 249 feet (76 meters).
Two ways to deal with altitude
For elite athletes to perform at their peak at high altitude, a period of adaption is required to reduce fatigue caused by lower atmospheric pressure and reduced oxygen availability.
鈥淵ou would expect a faster onset of fatigue, higher heart rates at any given running intensity, and a reduced capacity to sustain the high-intensity efforts that define modern international football鈥攊ncluding sprints, pressing actions, and rapid changes of pace,鈥� said Sam Shepherd, head of sports science at sports nutrition company Precision Fuel & Hydration.
To mitigate the physiological toll of thin air, sports scientists generally recommend two contrasting approaches: an extended acclimatization period of at least two weeks, or the 鈥渇ly-in, fly-out鈥� method鈥攁rriving as close to kick-off as possible before acute symptoms set in.
The latter is favored by visiting American professional sports teams from the NBA, MLB and NFL, which routinely land in Mexico City the day before a game.
For a month-long tournament, however, long-term acclimatization is becoming the standard.
South Africa selected Pachuca鈥攁 city sitting even higher than the capital at more than 8,000 feet (nearly 2,500 meters) 鈥攁s their base camp, arriving last Tuesday despite
South Korea, facing two group-stage matches in Guadalajara, has chosen a similar approach.
鈥淲e鈥檒l play at about 1,600 meters (5,250 feet),鈥� said head coach Hong Myung-bo. 鈥淲e鈥檝e had very little exposure to this environment, so I鈥檝e consulted with experts to determine our needs. We now have detailed plans not only for training but also for what happens off the pitch during our stay.鈥�
To prepare, the Korean squad has been stationed at more than 4,300 feet (1,300 meters) in Salt Lake City, Utah, since May 18. According to Shepherd, that can make a significant difference.
鈥淪pending two to three weeks at altitude stimulates the body to produce more red blood cells and improves oxygen-carrying capacity, meaning players arrive with some degree of adaptation rather than experiencing the full, acute environmental stress on match day.鈥�
Colombia, which plays its first game against Uzbekistan on June 17 in Mexico City, has been preparing for the World Cup in its high-altitude capital, Bogot谩, at 8,600 feet (2,600) meters above sea level.
Their itinerary requires managing big changes in altitude and climate as they move from the Mexican capital to Guadalajara, and finally to the sea-level humidity of to close out the group stage against Portugal.
鈥淭here is a definite physiological adaptation to altitude,鈥� Colombia coach N茅stor Lorenzo said. 鈥淲e have to play across three entirely different environments … but we have experience managing these variables and will use every tool at our disposal.鈥�
No altitude training for the Czechs
The were among the last teams to qualify for the World Cup through the European playoffs at the end of March. Their base camp near was chosen by FIFA and is about 590 feet (180 meters) above sea level.
They will fly directly into the thin air of Mexico City for a high-stakes group finale against Mexico on June 24.
鈥淚t won鈥檛 be ideal,鈥� Czechia coach Miroslav Koubek said after announcing his squad last month. 鈥淲e would have to spent a month in the environment to get adapted to it but there鈥檚 no time for that. We have recommendations from experts on how to cope with that but we can鈥檛 cope with that for 100%, that鈥檚 for sure.鈥�
The 1970 World Cup in Mexico was a fiasco for Czechoslovakia, which two decades later split into Czechia and Slovakia. The team lost all of its group stage games 鈥� against Brazil, Romania and England 鈥� and lack of acclimatization to the altitude was seen as a contributing factor.
鈥淚 was thinking a lot about the weather and the altitude that are awaiting us,” Czechia defender Tom谩拧 Hole拧 said. “I鈥檝e talked to people who visited such places, and played there. It will be something really specific, an interesting experience.鈥�
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Duerden reported from London. Associated Press writer Karel Janicek in Prague contributed to this report.
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