What is a posterior pelvic tilt?

A posterior pelvic tilt means that the top of the pelvis is slightly rocked backward, which causes the spine to compensate by losing some of its lordotic curve (the natural inward curve of the lower back). The flattening of the lumbar spine in this case can cause a completely different set of problems for the spine. One of the main reasons the pelvis adopts this position is that tight hamstring muscles prevent the pelvis from anteriorly tilting.

People with a posterior pelvic tilt also have a hard time getting their hip joints to let go of the pelvis, allowing it to tilt forward when bending forward. There is often no mechanical reason for this. Instead, it seems to be more of a learned movement fault.

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