Are these PowerLung devices any good?
They are expensive too. Being what looks like a peice of plastic to me
doesn't seem to justify the cost of it.
I wonder if one could simply use a piece of a garden water hose and restrict
the end until it is confortable and get the same effect or not.
Personally, I would think riding a bicycle a lot, hill climbing and interval
exercises would work much better.
But maybe for those who do not exercise at all, there might be some benefit,
as it is a exercise of sorts too.
PowerLung website:
http://www.powerlung.us/en/index.htm
They are expensive suckers too...
http://www.all3sports.com/index.php?mName=powerlung&jsenabled=1&osCsid=dbe967a447a27374ae685a8568fcf021