Shortened hip flexors are a primary contributor to back pain and a 'hunchback position' by pulling the spine into a stressed state.

“well what seems to be the number one deviation is our hip flexors are are shortened so immediately our back is [ __ ] like just based on the physics of everything coming down just gravity through life if your hip flexors are shortened your back is [ __ ] so you could get a strong back and prevent the symptoms and that would be part of it having a strong back but as long as your hip flexors are shortened and pulling you into this hunchback position of whatever degree then your back is taking more stress than it's supposed to”