Just like a three-year-old girl
I just read Christine's post about "The end of the neutral pelvis - Part 1" and it reminded me of something.
Last year when I found this site, I was explaining to my mother about the whole woman posture. She watched and listened as I demonstrated, then said, "So the right posture is just like C's [my daughter] posture!"
We looked at C, running around at three years old in her undies. Mum was exactly right. Her back is beautifully straight and long with an evident lumbar curve, shoulders down and proud, and whole abdomen relaxed and full-looking. No straining, no forcing, just completely natural.
I hope she never loses that.