It can also be due to altered anatomy of the pelvis and ... that is connected to your spine at your lower back (known as the lumbar spine). The pelvis can tilt or rotate forward and back.

pelvis, and abdomen. The IVC starts in the lower back where the right and left common iliac veins (two major leg veins) have joined together. It runs under the abdominal cavity along the right ...

In other words, kegels could be helpful if your pelvic floor is weak, but tight pelvic floors are better treated through tactics such as yoga, meditation and other relaxing techniques.