"When I get to 3-4,000 feet, it's about a 7-yard difference in distance for me," said PGA Professional Rob Labritz. "The higher you get, maybe it's 10-15 yards. Don't change anything in your swing, but stand out there and figure out how far you're carrying the ball. And then trust it. It takes a round or two to get used to."
What you might find, Labritz explained, is if you're someone who typically hits your 9-iron 150 yards, suddenly that club from that yardage is going to be flying over the green.
"Playing well at altitude requires you to commit to a mindset," Labritz said. "Just like a round at sea level, you want to make solid contact. You just have to accept that it's going to travel further. The more practice you put in, the more comfortable you'll be."
If it seemed as though the best players in the world had little to no issues adjusting in Mexico City, well, that's because they're the best players in the world.
"They're the best at adjusting," Labritz said. "That's why they're on Tour."
So remember: Higher elevation = less friction in the air. As a result, you're going to be hitting the ball distances you've typically only dreamed.