Pregnancy and the SI Joint

The sacroilliac or SI joint (right and left side) is formed between the two pelvic bones and the sacrum. For many years, it was thought to be immobile, but research has shown that the SI joint moves in all directions, and can be a significant source of pain.

For women, this is especially true. During pregnancy, the body secretes a hormone called Relaxin, which literally relaxes the joint capsules and ligaments especially at the SI joint, to allow it to stretch more during delivery.

This sudden excessive mobility can bring pain as well, as the muscles surrounding the SI joint struggle to control it during movement. Also, very often one SI joint will have a history of being restricted and the other too mobile. During pregnancy, the hypermobile SI joint will be coming even more flexible. This is generally the side where pain will occur.

Location of symptoms vary from pain directly over the SI joint, in the buttock area, or down the back of the thigh as well.

The most effective physical therapy approach is to increase the mobility at the restricted SI joint to help distribute the stresses evenly.

There are also a number of exercises that can also be performed to help safely strengthen the muscles around the SI joint. Many of these can be performed even up to full-term. These exercises should always be individualized based on a thorough history and examination.

Steve Daisey MPT, CSCS

DISCLAIMER:
The information presented on DaiseyPT.com is provided for educational purposes only and is not intended to be a substitute for professional medical or physical therapy advice. You should not use the information on this web site for diagnosing or treating a medical or health condition. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider.

The exercises presented in these articles pose risks if performed incorrectly or if performed by persons who may be inappropriate for them. They are provided for informational purposes only and to provide education and insight into a particular interest. Daisey Physical Therapy & Sports Medicine Inc. does not recommend performing them without a complete history and examination as well as professional instruction. Daisey Physical Therapy & Sports Medicine assumes no liability for any injury that may occur by attempting the exercises presented here.