Yes Scrap, I was going to stick this on the asthmatic thread but thought I'd open the subject up a bit and didn't want to go too far off topic there. I like the idea of different brain hemisphere training through closing the nostrils. I'm looking at this from a blood O2/CO2 concentration angle, training the actual breathing response and the effect this has on the cardiovascular system.

Maybe we're talking about the same thing, I'm not sure. Any thoughts would be appreciated.