Yup. Denver is high enough to cause temporary problems in susceptible individuals. The answer is that you will aclimatize. It should take three to four months.
My wife has been using Oxygen at night, prescribed by the Dr. because her levels set at 88 or so most of the night and can go as low as 79. She wakes 11 times an hour, even with O2. She has just undergone sleep studies and has slight apnea from blockage when she sleeps. She used to sleep on her side till she had a frozen shoulder and then adapted to her back, this is when we think the troubles all started.
We live in Colorado. I was wondering IF moving to a lower altitude would possibly solve the O2 issue or help?
We used to live in Thailand at lower altitudes and in high humidity and sleep seemed to come better.
She is 55.
Denver is a lot higher in elevation than most places, and I am almost positive that the elevation is causing the listlessness. It takes our bodies awhile to adjust to the difference in sea level. Some of it could be emotional as well, but, I think the bulk of it is the elevation.
To my knowledge, there really is not much you can do, just do not over-do things until you get re-adjusted to the altitude.