What is the function of the SI belt during pregnancy?

The sacroiliac (SI) belt plays a crucial role during pregnancy by stabilizing the pelvis. As pregnancy progresses, the body undergoes various physiological changes, including the release of hormones like relaxin. This hormone facilitates the loosening of ligaments in preparation for childbirth. However, this increased laxity can lead to instability in the pelvic region, resulting in discomfort and potential misalignment.

The SI belt provides necessary support by compressing the sacroiliac joints and helping to maintain proper alignment between the pelvis and spine. This stabilization helps to alleviate pain and improve overall functional mobility for pregnant individuals, which can be particularly important as their center of gravity shifts and additional weight is carried.

While lumbar support, abdominal muscle tone enhancement, and leg circulation may be considerations during pregnancy, the primary and most direct function of the SI belt is to offer pelvic stability, addressing one of the most common issues faced by pregnant individuals.