Our nose and sinuses take up around 30% of the space in our skulls and in that space a whole load of things are done to the air that we inhale to make sure, when it reaches our lungs, it's in the best possible condition it can be for us to use. And the things that happen are we warm the air, we filter it and in some environments we might actually moisten it, if we're in a really dry environment. This all happens very naturally, we also produce something called nitric oxide, which not only helps us to better absorb the oxygen that we're breathing in, is also a very potent antiviral agent and all of these combine together to give your immune system the best chance to defend against things like colds, viruses, airborne pathogens, allergens, anything that could get into the lungs.
Now i'm not saying that nose breathing will prevent these things from entering into your lungs, there is no data to support that, but what i am saying is, you are helping you, are giving your immune system the fighting chance to help you by breathing through your nose. Because when you breathe through your mouth, you get none of those benefits. Our mouths are for eating and talking, our noses are for breathing. So, first thing most important, always breathe through your nose. With that you'll need to look at your posture slightly, because it's quite difficult to breathe through your nose when you're hunched over. So either standing or sitting upright with shoulders down. If that's really uncomfortable, if you're sitting you're finding it's creating tension, just lean back against the cushion slightly and focus on breathing through your nose, which will help you draw the air down into the lower part of the lungs, which is going to start stimulating those feelings of well-being and relaxation and take you away from the fight or flight mode which encourages the stress and anxiety. So, one, breathe through your nose.
Breathe Evenly
You need to find a rhythm for your breath where the volume of each breath is the same and the length of each breath is the same. Find that rhythm, relax into it, the more you relax into it, the longer you can make your exhale without causing any additional stress. And the longer you are able to gently extend your exhale, the more again you are stimulating those feelings of well-being and relaxation and grounding yourself and feeling in control of yourself and the situation around you as much as you can be.