What indicates that the pelvis is in a posterior tilt?

The posterior pelvic tilt is characterized by the position of the pelvic bones relative to one another. When the pelvis is in a posterior tilt, the position of the PS (posterior superior iliac spine) is higher than that of the ASIS (anterior superior iliac spine). This tilt resembles a bowl tipping backward, causing a rounding of the lower back and an engagement of the abdominal muscles.

In this position, the ASIS is naturally pushed forward and down in relation to the PS, which sits higher due to the adjustment of the pelvis. This positioning reflects the alignment necessary for a posterior pelvic tilt, suggesting a greater tightening of the hamstring muscles and a decrease in the natural lumbar curve. Understanding these anatomical landmarks and their positional changes is essential for assessing pelvic alignment and guiding clients through effective movement patterns in Pilates.