Without a doubt, there is MUCH more anterior pelvic tilt amongst back pain sufferers than posterior pelvic tilt.
Why you may ask?
Well, because your body operates in such a way where it has groups of muscles that operate together when certain factors are present. Say, for example, when you go into “fight or flight”, your chest sinks as your upper abs tighten, the back of your neck and upper shoulders tighten, all with the purpose of protecting vital organs.
In the pelvis, the muscles that shorten and increase tone when you are under stress include:
1. The Psoas
2. The Quadriceps
3. The Adductors (groin muscles)
All 3 of these muscles contribute to anterior pelvic tilt! Now, interestingly enough, a smaller percentage of the population goes the OPPOSITE direction when they get stressed! They actually go into posterior pelvic tilt.
So, what is the difference between the two? What makes someone go into anterior versus posterior pelvic tilt, particularly when stressed? In my experience, postural imbalances are HIGHLY correlated with psychology, and particular characteristics within that realm.
But…thats another blog post!
–Sam Visnic