Very interesting.
Instructive video on Nadhi Shodana, or alternate nostril breathing. Extremely useful for lung function, also calming to the mind. I do occasionally, should start daily. Very simple to do, takes maybe 10 minutes.
https://www.youtube.com/watch?v=RUFzLVf5wL4
Nadishodhana/Anuloma Viloma Pranayama
I had not read about that.
Interesting!