Hi Phuong Thank you for all of your forum comments. I'm happy you're enjoying the practice. I just checked your website link and noticed you studied with Dr. Stephen Porges, author of Polyvagal Theory. I am currently writing a book "Gravity & Grace" with Sounds True and his work has inspired my writing. We both feel the same about the 'mind' in our guts, and how slow breathing is the key to the parasympathetic nervous system, via the vagus nerve. Its such a small world... Peter