On the subject of breathing in general I highly recommend James Nestor’s Breath Breath: The New Science of a Lost Art https://www.amazon.com/dp/0735213615/ref=

On the subject of breathing in general I highly recommend James Nestor’s Breath Breath: The New Science of a Lost Art https://www.amazon.com/dp/0735213615/ref=cm_sw_r_cp_api_glt_fabc_8D3MWJQTQ4DJ5X7J0SKD https://www.amazon.com/dp/0735213615/ref=cm_sw_r_cp_api_glt_... And numerous podcast interviews by James. These had life changing takeaways for me. Main one being - running with mouth closed, with exhales much longer than inhales.