I read the book and was delighted by all the wonderful pictures of beautiful people and their beautiful postures! i've tried all the exercises, but the main block i seem to have is that I can keep my back 'straight' when sitting, especially when sitting on the ground - i cannot sit on the ground or in a chair (although it is less extreme in a chair) without my back rounding, particularly at T12 where I understand the psoas, trapezius, solar plexus and diaphragm all meet/attach. it has been this way since my earliest memories at 6 or 7 years old. i was in dance and did intense stretching but was not able to ever gain more flexibility. i feel that the psoas muscle is the block, or this lumbodorsal junction and kyphosis is the block. has anyone dealt with this issue? the kyphosis appear to be postural...the spine bones seem to be intact with reasonable disc space after taking x-rays and working with some local practitioners.