What's with the spine in Gong Bao Tian Style Baguazhang

[tianzhang]

The back in Gong Bao Tian style Baguazhang isn't curved naturally like other styles, it's kept regular and the buttocks sticks out. This isn't unique to Gong Style either but also to Chen Zhaokui TJQ lineage anyone know the theory behind this?

[Gerard]

It's called "turtle back" in most BGZ styles. From experience, the bum sticking out (only present Gong Bao Zhai lineage)is a direct consequence of all the heavy emphasis on foundation work/grounding this lineage is famous for. Naturally your whole pelvic area expands, loosens up and as a result the butt sticks out.