One of the biggest talking points around this year's World Cup has been the heat. Players from countries with very temperate, cool climates, like Norway and England, have had to play back-to-back games in hot and humid conditions, placing enormous stress on their bodies as they struggle to keep their core temperature down.
When core temperatures rise, fatigue isn't far behind. Research has shown that elevated internal body temperatures cause fatigue during prolonged exercise in hot environments, even for trained athletes. Staving off exhaustion by staying cool is therefore crucial.
