Ok I'm trying to workout what i think of this and i think it sounds good but i'm not sure if it's the sort of thing you might be able to do without having planned your training for it.

Thing is the only exercise i can think of which would simulate the same thing is swimming underwater as far as possible before coming up for air.

Or i have heard of a boxer who used to be local to this are who would run up a hill with his mouth full of water.

Sort of like trying to do weight training for your inspirtory muscles but without thing (expensive) thingy it's fumbling around without weights

Opinions?

The official POWERbreathe website. Hand-held inspiratory muscle trainer for anyone who breathes.