There are lots of breathing techniques out there and I use a couple of simple ones. When we breathe, we engage our pecs, our scalenes, our SCMs, the muscles either side of our spines and our rhomboids, to help us breathe.
However, when we learn to breathe through our belly, then all those upper back muscles can take a bit of a rest and we won’t feel as much tension in that area, as so many of us do.
If we belly breathe, our diaphragm is worked. When this muscle isn’t used enough it can shrink and weaken, just like with any muscle we don’t use enough, and if the diaphragm weakens and shrinks it can result in lung issues or breathing difficulties in those of us who have underlying issues.
I share more in the following video: