Kung Fu - Bagua Middle Dantian Training - Marcus Brinkman
My teacher Marcus Brinkman - Learn Bagua Zhang at Boulder Internal Martial Arts
"Qu and Chuai are terms which represent the development of the Gao Bagua front and back kicks respectively. In practice however the are developed as a pivoting dynamic which constitute the waving dynamic of the dragon body shape and character. It is therefore also a basis for sweeping and throwing methods which evolve from the "danzhong" or single weighted foot and leg cultivation. This is a brief synopsis of the training progression which arises from the foundational circle walking practice. The leaning body (Kao) movement resulting from this practice tends to focus on the middle basin development of the body and is foundational to "middle dantian' development."