Breathing and Exercise: Strength Training for Your Diaphragm (2018)
Lot of people tend to have respiratory failure before situation gets worrisome and breath exercises are a definite way to help your body do what a ventilator doesIn yoga asanas, there are few breathing exercises that existed in ancient India and I myself can attest to it that I was able to overcome lot of allergies practising it,Here is a resource to follow along. https://youtu.be/iUKjuni-6l8 starts at 9 mins and goes on for  15 mins or soAnd yes everyone breathes the wrong way, we pull in stomach when inhaling which is supposed to be otherway round, I know it's surprising to hear that we are breathing wrong. if you want the proof just notice a child breathing that's the most natural form of breathingIf you are looking for keywords to look up, the are anuloma viloma & kapalabathi.Stay safe, stay healthy.