Around here it's been much drier than usual and the various pollens have been in the air for longer so every thing plugs and I use Spiriva once a day and Ventolin when needed which lately is a lot for me, I'll be working along and all of a sudden I run out of steam and I have to nap more just to keep up and yeah Bill it's damm hard to do what is needed when all you feel like doing is crashing for an hour, as an aside, age does play a part so you're constantly wondering whether you are failing or you forgot your puffer ( I constantly check to see if my palms are gray ( no oxygen)). My advice is if you've got major projects that are physically demanding do them as soon as you are feeling better because as the years drag on, your ass drags more and they are harder, harder to do.
Bill the demon.