The C Posture, as classified by the Titleist Performance Institute (TPI), is one of the more common golf swing characteristics the detrimentally impact the golf swing. Watch TPI Level 3 instructor, Ken Miller demonstrate 3 profoundly impactful exercises using Core-Tex. 

Stillness and being propped in "proper" position is not the solution to avoid back pain while sitting.  Mico-movements give the brain and biology what they need to stay healthy and do more than any ergonomic chair will ever do.