Hi William,
Thanks for getting in touch and sharing your experience on this topic. I agree, I am finding it works for me as well, especially under moments of exertion and exercise – even though it is intended for COPD patients. I had heard of this before, as a result of my work on the forums, and then when I started attending pulmonary rehab they taught me this as well which was quite helpful. At least worth giving it a try for others, isn’t it? I find it helpful too 🙂
Thanks for sharing.
Cheers,
Charlene.