If you lived there you would get used to the altitude but being a low lander it is difficult. When we drive from Texas and take several days doing it I seem to adjust. But to fly to Denver, rent a car and be at 10,000 feet in a couple of hours, I think I am too old to do that again.
On one trip, an art workshop that I had looked forward to for a year, my heart pounded night and day and I could not fall asleep for a week. I was a basket case.
My husband has the opposite reaction, he falls asleep sitting up and has trouble staying awake.
Because of the thin oxygen at high altitude, many people have trouble going to sleep.
Why, you ask?
Because we breathe automatically at night; no thought is required.
The problem is that the body cannot get enough oxygen using that automaticity.
It was always my weakness when backpacking and mountain climbing. I simply could not fall into a restful sleep, even when bone-tired.
The highest I’ve ever climbed was 14,495 feet.