Originally Posted by
Flight Alloy
our lung muscles have very limited overcapacity
I'd love for you to point out on an anatomical diagram where you think the lung muscles are... There ain't no such animal.
Chest muscles, and Diaphragm muscle, yep, but neither of those have a "capacity" as such, the chest cavity can expand by up to 1.5 to 2 litres from maximum exhalation to maximum inhalation.