Dear Shaker
Hello and welcome to the forum. Thank you for telling us about Square Breathing. It's title I have not heard of before. I was taught something very similar which was called belly breathing and as the name suggests it's usefulness is being able to breath deeply into your stomach.
I think we need to be reminded of these techniques from time to time. I know I forget when the need for deep breathing has passed and of course do not use it when it would be helpful.
Mary
