Hi Pete,
As you said there is not enough information about asthma and freediving. When I was preparing my Internal Medicine graduation work, I propose a work to see the effects of apnea diving in asmathic patient, but my proffesors opinion it that will be worthless and had to change it.
The way we (freedivers) breath that is based mainly in pranayama techniques is very good for asthmathics.
But I have my concerns about deep freediving, as you may know, the only problems with asthma is not the bronchospasm, but the mucus hyperproduction, after a deep dive (50-60 meters) your lungs get really compresed, and I wonder what will happen with mucus plug in the ascent. Of course this is all theoretical.
You said your asthma is moderate persistent, and as you said the symptoms are very rare. Then your Functional Test should be not so good. What is your best FEV1 and PEF? please in % of predicted
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