# The Stupidly Simple SI-Joint Pain Fix Source: https://www.youtube.com/watch?v=h9Bkooj_eHY Recap page: https://rapidrecap.app/video/h9Bkooj_eHY Generated: 2026-03-01T18:33:56.85+00:00 --- ## Quick Overview The fix for sacroiliac (SI) joint pain, often caused by a stiff pelvis stuck in external rotation compressing posterior hip muscles, involves using a rolled-up hand towel placed between the mid-thighs while lying on your side to encourage internal rotation and decompress the SI joint area. **Key Points:** - SI joint pain is often associated with a pelvis stuck in a shape that resembles external rotation, leading to tight and compressed muscles on the backside of the pelvis. - The corrective exercise involves lying on your side with a foam roller or a tightly rolled hand towel placed between the mid-thighs. - The goal of the setup is to use the pressure of the object between the thighs to push the top femur into internal rotation, effectively changing the pelvic shape. - The movement should be very slow, aiming for about 1 inch per second, moving back toward the extended position and then inhaling to return to the starting position. - It is crucial to keep the bottom leg's pelvic crest bone in contact with the floor and avoid rolling so far forward that the top knee passes the bottom knee or the pelvic crest lifts off. - The entire body should be kept stable; only the top leg should move slightly, preventing excessive tension or movement in the low back. ![Screenshot at 00:01: The video uses an anatomical model to highlight the SI joint area \(marked with a red dashed outline\) on a person's lower back, illustrating where stiffness or misalignment causes the pain being addressed.](https://ss.rapidrecap.app/screens/h9Bkooj_eHY/00-00-01.jpg) **Context:** The video addresses sacroiliac (SI) joint pain, explaining that the root cause is often a mechanical issue where the pelvis is fixed in a position of external rotation. This fixed position compresses the muscles on the back side of the pelvis near the SI joint. The presenter uses a pelvic bone model to visually demonstrate how this external rotation shape compresses structures and limits necessary internal rotation mobility. ## Detailed Analysis The presenter identifies that many people with SI joint pain have a pelvis locked into a shape that promotes external rotation, which tightens and compresses the posterior pelvic muscles. To correct this, the individual must encourage internal rotation. The technique requires lying on the side, using a foam roller or a tightly rolled hand towel placed between the mid-thighs. The head should be supported, perhaps with a block or pillow, and the top arm extended forward or resting. The key movement involves using the pressure from the object between the thighs to push the top femur into internal rotation. The movement is slow, about 1 inch per second, moving back towards extension (internal rotation) and then inhaling to reverse the process. Crucially, the bottom leg's pelvic crest must remain in contact with the floor; the top knee should only advance about 1 to 2 inches ahead of the bottom knee, and the movement should not cause pinching in the hip joint or excessive movement/arching in the low back. ### SI Joint Pain Cause - Pelvis stuck in external rotation - compressing posterior muscles - limiting internal rotation access ### Setup for Fix - Lie on side with foam roller/towel between mid-thighs - support head with a block/pillow - keep top arm forward or resting ### The Movement - Use thigh pressure to push top femur into internal rotation - move slowly (1 inch/second) back to extension - inhale to reverse the process ### Crucial Checks - Keep bottom pelvic crest bone on the floor - limit top knee advancement to 1-2 inches ahead of the bottom knee - avoid pinching or low back movement ![Screenshot at 00:00: Visual demonstration using a pelvic model overlay to show the 'STIFF' external rotation position causing the issue.](https://ss.rapidrecap.app/screens/h9Bkooj_eHY/00-00-00.jpg) ![Screenshot at 00:16: An anatomical diagram highlights the posterior hip muscles that become tight and compressed due to the external rotation.](https://ss.rapidrecap.app/screens/h9Bkooj_eHY/00-00-16.jpg) ![Screenshot at 01:02: The physical setup showing the required tools: a foam roller \(blue\) and a tightly rolled hand towel \(black\), with the presenter kneeling.](https://ss.rapidrecap.app/screens/h9Bkooj_eHY/00-01-02.jpg) ![Screenshot at 01:22: The correct side-lying position with the foam roller between the mid-thighs, demonstrating where the therapist should feel the pelvic crest rest.](https://ss.rapidrecap.app/screens/h9Bkooj_eHY/00-01-22.jpg) ![Screenshot at 02:00: Demonstration of the movement: the top knee moves forward slightly, pushing the femur into internal rotation, contrasting with the bottom leg remaining stable.](https://ss.rapidrecap.app/screens/h9Bkooj_eHY/00-02-00.jpg)