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Greg, good question!Obiviously your martial arts style is prudent in its emphasis on breathing technique. On the subject of forced exhalation and forced inhalation, I think it is not a problem while you are at depth. It could/ would produce a problem if done while changing depths. When I teach breathing I teach to exhale fully, but without forced exhalation, same on inspiration. I have good gas consumption doing this and beleive it results in much better ventilation as the gas gets into the lowere third of the lungs where the majority of circulation is(on land). What I advocate is 6 to 12 seconds in , no pause (max of 2 to 3 seconds is acceptable), same exhalation cycle. The next step is just as we do in martial arts is to develop the discipline to maintain this pattern even under extreme exertion. In martial arts while fighting, and when doing exercise, while at the maximum point of exertion. Trick is to bring in more volume under exercise without an increas in rate. this of course results in more survival discipline as well due to being able to force the body and mind to do what at first is not its normal habit of comfort zone. Ususally when i start people on this program they at first say it is not possible, then 2 to 3 months later ,I get an excited call with a YOU KNOW IT REALLY WORKS, AND I HAVE CUT MY GAS CONSUMPTION DOWN CONSIDERABLY. I have spelled this out because I plan to post it to cavers as there has been a discussion on gas consumption going on there. I know you already understand the mechanics I pointed out. Note! While I have quite good gas consumption, even with all my practice I have not reached the 0.3 cubic foot of swimming gas consumption that I saw soneone over on compuserve claiming to have. A small lady such as my wife may get to this extreme or a practiced breather at rest but swimming I really doubt a male over a 160 pound body weight can get that low of an exeretion RMV. Tom Mount You wrote: > >Tom, Here is my question about breathing! > >I have studied a chinese martial art for about 10 years now and have been >using the breathing exercises in my diving. My question is this , when you >are breathing a gas under pressure and you are breathing using a >breathing style that deflates the lung forcefully does the lung suffer any >stress from the pressuer differance in the gas and your overdeflated >lungs??? > > >
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