I have to share a sacrum “trick” with you. Very simple, but you need another person to help.
My dear friend taught me this and it works wonders if you feel like your sacroiliac joint is out of alignment. (where the wide ilium/hip bones connect to your sacrum, one joint on each side)
Lay on the floor on your back with your knees up, feet flat on the floor. Exhale and let your lower back sink flat against the floor. You will be doing a pelvic tilt. (top of pelvis moving towards floor and bottom of pelvis curving upward) Now your handsome assistant puts his or her hands on the outside of your knees and presses in as you resist by trying to press your knees outward. Press for a few seconds and release. Now your assistant moves their hands to the insides of both your knees, and presses your knees outward, while you resist by pressing your knees together. Be sure to keep your lower back from arching.
You may feel and or hear an adjustment, and you may not. Even if you don’t, you are strengthening the muscles that keep your pelvis and sacrum stabilized which is always a good thing.