Comment on Box breathing techniques and benefitsComments−rednerrus3yThis is a great book if you're into breathing and sports: https://www.amazon.com/Body-Mind-Sport-Lifelong-Personal/dp/.... He covered a lot of this back in 1994.
Comments
This is a great book if you're into breathing and sports: https://www.amazon.com/Body-Mind-Sport-Lifelong-Personal/dp/.... He covered a lot of this back in 1994.