bwfm, They did not really give me a reason. My weight is fine.......well OK I could lose the 7 lbs I gained this winter but at 136 being 5'4" I don't think is overweight.
I have oxygen to use only at night. The pulmonary doc said it can possibly get worse but not anytime soon, years from now.
It was also never mentioned to move which I would not do.
Doc said that my breathing got real shallow when my oxygen dropped.
If you find anything out please let me know and maybe oxygen at night will help. Someone, somewhere said that oxygen levels that low was a reason for medicare to pick up the tab for the oxygen but I don't know.