Posterior Pelvic Tilt vs. Anterior Pelvic Tilt

Posterior Pelvic Tilt vs. Anterior Pelvic Tilt
Q: Is posterior pelvic tilt or anterior pelvic tilt causing my back arch? What’s the difference vs. the two? A: Chances are you have anterior pelvic tilt (APT) which is more common than PPT. To determine which it is, perform these 4 tests on your back curve: Look at your back. With posterior pelvic tilt, the lower back is flat and doesn’t have any kind of arch to it. The upper body will have a bigger hunch than a person with an anterior tilt because the spine has to compensate. Look at your feet. Where an anterior tilt causes legs to rotate inward, a posterior tilt rotates legs outward, and is evident in the feet appearing to splay outward. Look at an x-ray. You can also measure pelvic tilt by the pelvic tilt angle on lateral standing X-rays, and measure also the pelvic incidence angle in the same X-rays. The opposite of a posterior pelvic tilt is an anterior pelvic tilt, in which your pelvis tips forward and the lower back arches. Posterior Pelvic Tilt Vs. Anterior Pelvic Tilt The pelvis moves back and forth between two positions: anterior pelvic tilt and posterior pelvic tilt. Whereas anterior pelvic tilt involves an exaggeration of the natural lumbar curvature (the S-shape of the spine), posterior pelvic tilt is a reduction in the natural lumbar curvature. Posterior pelvic tilt is the opposite of anterior pelvic tilt; the back of the pelvis has dropped, and the front of the pelvis has risen. Posterior pelvic tilt is not as common as anterior pelvic tilt. Like anterior pelvic tilt, posterior pelvic tilt is a postural is a postural deficiency, although a less common one. The muscular imbalance in a posterior pelvic tilt is the exact opposite of an anterior pelvic tilt (the abs, hamstrings, and in particular the glutes are tight and weak, and the erectors and hip flexors are lengthened and weak). Sometimes (in ~40% 3 of people) the inferior rectal nerve innervates the levator ani muscles independently of the pudendal nerve. As can be seen from the pictures, it is the position of the top of the pelvis, not the bottom, that determines whether the tilt is anterior (i.e. forwards) or posterior (i.e. backwards). If you haven’t already, I suggest you read my anterior pelvic tilt (APT) write-up (or posterior pelvic tilt (PPT) depending on what you have) and my computer guy upper body write-up. How Common is Posterior Pelvic Tilt Vs. Anterior Pelvic Tilt? Herrington (2011) examined the pelvic tilt of 120 healthy individuals (65 males and 55 females) and found that 85% of males and 75% of females exhibit anterior pelvic tilt (APT), 6% of males and 7% of females exhibit posterior pelvic tilt (PPT), and 9% of males and 17% of females exhibit a neutral pelvic tilt. Original article and pictures take http://posteriorpelvictilt.net/2015/10/20/posterior-pelvic-tilt-vs-anterior-pelvic-tilt/ site