After reading everyone's observations and taking notice on other peoples bodies, I've come to notice some interesting things about my parent's heights. Mom 5'1 dad 5'9. Even though I'm 5'6-5'7 my mom has only about an inch of sitting height less than me. This just doesn't make sense to me...I also have a pelvic tilt which causes spine to stick outward and forces a rotation on my hips. My posture isn't that good, standing up fully erect feels like it takes a lot of energy and tucking my chin to my chest causes a red hot stretching feeling. I'm beginning to think that maybe my sitting height could be higher if I worked on spinal posture but I'm not sold that there is any relation or even where to begin if there was.