In an effort to refine my technique, I purchased a book entitled Martial Mechanics by Phillip Starr. Although I found the book useful, I was confused by his breathing technique.
He described reverse "chi" breathing, as follows:
1) inhale through your nose and slightly contract the abdomen. Don't expand your chest or raise your shoulders.
2) As you exhale through your mouth, expand the lower abdomen, along with the front, sides, and lower back, owtward. Slightly contract the anal sphincter and tuck the coccyx forward and upward. Don't arch the chest .
He claims strength and durability benefits from this type of breathing. He also says that normal breathing (especially contracting the abs) separates the upper and lower body, freezing the kinetic chain (my words, his idea).
I personally have never heard of "reverse breathing" before this, and I remain skeptical. I intuitively think that "normal breathing" makes more sense, especially since his book is laced here and there with references to chi.
Has anyone else heard of this? Any (preferably educated) opinions?