Nasal Breathing Combo #1 - Cat/Cow + Wave Unload
Breathe only through the nose.
If this is too difficult you may cheat it a little with some mouth breathing but work your way to be able to do this.
Take breaks when needed.
Perhaps use nasal breathing tape (you can get at your local pharmacy store)
Keep lips sealed as you do the combos.
Use a piece of paper to assist you in keep lips sealed.
Be sure not to clench jaw.
-Focus on expanding your ribs 360 Horizontally
-Match your movements to your breath and find a rhythm to flow to
-Keep the breath smooth and undulating