[anonymousnotme]

I also like seeing new breathing techniques. However, as other have pointed out; I would look to the yoga pranayama that has been used for 5,000 years or longer. As I have learned from pranayama, the description in the article tries to make everybody breath the same. Each individual has their own lung capacity and rythym that they should follow. ne should find out what is the natural amount of time for one to go from empty to full lungs then do the rest at the same rate. So, if it takes one 9 second to naturally go from empty lungs to full lungs, then hold it for 9 seconds, then exhale out over the course of 9 seconds. Then hold out for 9 seconds. Then repeat as appropriate. I would personally consider 4 seconds to inhale from empty to full lungs or 4 seconds to exhale from full lungs to empty lungs too quick and not relaxing. I would suggest find experienced yoga teacher that can guide one and tailor to one appropriately as the description in the article and following referenced page seems not giving full/accurate instructions:

https://www.verywellmind.com/abdominal-breathing-2584115