I’m old and an amateur. My occupation required years of sitting. I have a variation of the problems mentioned but without severe pain. I work all the way up my left side: foot, calf, quads, hams, etc. BUT release of the psoas is the absolute best. I need to work it several times a day. It’s not a one time deal. It took 40 years to get screwed up. So, I imagine it will take awhile to relax. As you know it’s big and powerful. That’s my 2 cents and that’s probably what it’s worth.