[QUOTE=taai gihk yahn;932444]actually, one "old guy" I studied w/for a brief time had a great way of dealing w/the shock of going in and out of air-conditioned buildings/subways in the summer: before you go in (or out), you take a deep breath of the air you are in; then you walk into the other temp, holding the breath as long as you can; then you exhale that breath all the way and hold it out as long as you can; only then do you take a breath of the different air - by then you are much more acclimated - works like a charm, I gotta tell you, especially in NYC subways in the summer QUOTE]

I've been doing something like that most of my life, but with a variation: Where I live, there can easily be a hundred degree temperature difference between indoor and outdoor air. When you leave a heated building you take a breath, exhale slowly and gently "sip" small quantities of cold air to give your lungs and circulation time to adjust. You Canucks know what I'm talking about.

jd