Hey Barbara ,
Well I wasn't able to make stairs more than 2 floor and that with 4 or 5 stops for rest , but for me the water is like ...I don't know it's was always easy ,now is not so, but for 25 meters it's still not so hard as the stairs or walk.
And that was very amazing effect of better feeling after 2 months at sea and fresh air - when i came the first time there at the apartment (End of June) I was on O2 and 100 meters was my max, but after 2 months (end of august) I was able to swim 20 meters butterfly, to walk 500 to 700 meters and even to play slowly volleyball for 10 minutes
Was amazing really what the sea level and air has done with me. And I normally lived at the Swiss border ,but now I was at Black Sea at my birth country Bulgaria and there come many tourists exactly because of the specific air at black sea.... (sadly only from June to the end of September is hot and sunny).
Now I want to try Florida for 6-7 months - there is warm in winter too , and my stem cells procedure by Dr. Grekos is in the middle of November, so will be great i hope
Barbara, for me the main problem is the lung too - I met people with PH, who can walk and have pressure 90 , some who don't have low O2 sat , so my problem is very close to COPD , only that my lung function (volume) by the test in the cabin is almost OK, maby because I was swimmer, but my PO2 is 59% , my O2 Sat is 92% without O2, and last year when I was only in hospitals, the thing were .... 43% and 65% O2 Sat - so I know very well what is your condition about breve ,my is better too, but still this lung problems and only with car, because I can't walk.
So, If you try some vacation on warm place with sea air and to be close to the sea where you sleep - you should let the window open 24/7 and than your lungs are deferent, I was so much better those 2 months ....
Now I am again on O2 and spend most of my time in bed, but I hope that will be deferent in a few months , i prey for this to be much more deferent