Bass may give you a narrower neck, but you'll need more force to play it.
You'll also utilize less fingers most of the time, so it may not give you
the workout all the fingers need.-

however, you need more force on the individual strings, (strength) and
with the wider frets (streching) i would think it could be quite
thereputic. Granted you don't have the more precise touch a 6 string
guitar would ahve, but then again, if it gets to the point where the
loss is to predominate for a guitar then bass could be a wlecome
thought.

If a person really wants golf like frustration, or a precise workout,
then pick up a fretless! It'll tell you how your dexterity is, and
grade you like a fine toothed comb! ?:

But granted, i really wouldn't entertain an upright because you end up
gripping the neck, or at least I do. That's one reason I got rid of
mine. OH it was set up really well, but 1) I couldn't really justify
taking up a whole corner of a room to keep it (full 4/4 Kay), and 2)
too much work for the results I was getting.I was moving my arm up and
down the neck like a pump handle and my hand ended up being a
portable capo.


Anyhow. Tom, I wish you well with your decisions.