Nausea, cramps, shortness of breath. Time-lagged, unacclimatised, eyes bulging as the vertigo hits. Not to mention three times more likely to suffer unwanted swelling of the brain. Watching England play football at this World Cup has certainly been a physical trial at times. Not least for those back home hunkered around the screen, feeling the energy surge then sag again through the dead periods in Boston, New York and Atlanta.
And now we move on to the altitude of Mexico City, the Azteca, host nation energy and a beautifully pitched last-16 game, one of those occasions that seems to go beyond sport, to carry its own sense of something epic and gravitational, an emotional weather front about to break.
