Holy schmokes, this is excellent.
I posted in another discussion about my experience at a 10-day meditation retreat earlier this year. All of my symptoms went away, beginning on day 3 and lasting for the duration of the retreat. I've never felt better.
Since I returned from the retreat, I've been trying to replicate the state I was in to no avail.
Well, after reading this thread, I felt determined to try to release my psoas. I set a timer for 40 minutes, laid down in the constructive rest position, and started performing holotropic breathing (breathing deeply in a circular pattern) while focusing intensely on the sensations in my psoas.
After 20 minutes or so, I began to experience sensations I haven't experienced since my meditation retreat. I felt those muscles begin to release, along with a heightened awareness of the sensations in my genitals. I continued doing the holotropic breathwork, and it kind of felt like I was "blowing up" my hips, pelvis, and genitalia, as if it was all one big balloon. Those muscles began to tense up involuntarily, which somehow seemed to give me relief.
After the 40 minutes was up, I stood up to walk to the bathroom, and then my knees did something odd. It felt as though my legs were buckling, and my knees were in pain. I gave up trying to go to the bathroom, and wound up limping to my couch and collapsing.
Then I started laughing, almost uncontrollably for a minute.
This reminded me of a YouTube video I watched a while back about TRE/bioenergetics. The guy said that his bioenergetic therapist told him to basically hump a couch for five minutes, loosening up the hips. Toward the end of the five minutes, he exploded in a fit of uncontrollable laughter.
One time I tried bioenergetics myself for an hour, and then had a horrible fit of road rage afterward.
My best explanation for this is that the body stores all sorts of trauma and repressed emotion in its musculature, and anything that releases muscular tension (meditation, holotropic breathing, TRE/bioenergetics, massage, yoga, psychedelics, etc.) can cause a release.
I'm going to experiment with this combination of the constructive rest position, holotropic breathing and sensory meditation over the next several days, and see if I can distill this into a recipe that anyone can follow.