Hmmm... interesting thoughts. I come from the sunny south and have gotten plenty of sun throughout the whole ordeal - even on days when I'd much rather be inside...

Some could have a deficiency... others may just feel better because of being able to get up and about.

I know that when I was better enough to get off my couch without being required to do so, the whole world became a much nicer place.

Not trying to knock your thread - just offering a different point of view.