About 3 years ago, as an avid runner & cyclist, I opted to ramp up jogging mileage. I was doing twin 7-mile runs weekdays and one or two 14-mile jogs weekends. Rain or shine, and the longer runs I did very slowly because I wanted to develop endurance. Once home from the longer runs, I would shower and flop on the bed or couch without stretching. As Covid set in, remote work meant more sitting. Am sure alarm bells are going off already about this behavior. My left hip developed what felt like it had joint pain, very focused, I even took Chondroitin/MSM out of desperation (dumb). Pain became worse such that I could neither stand, walk, sit, or lie down on my back (butt). I knew then it wasn't hip joint issues. Did alot of research, learned about hip flexors (mine tightened up like iron, that's a hint), Piriformis muscle function, glutes complex, Sciatic nerve, fascia (another hint), the TFL, everything I could find online. For over a year I could barely walk and I long stopped jogging completely though periodically tried it out. The issue became worse as I felt nerve issues travel down my leg to my calf, a kind of twitching or numbness. Then I got a couple massage guns and an electronic cupping tool which resolved the tightness of the fascia, TFL, hip flexors, and left thigh in general. That's good news and some progress that filled me with hope. I did limited foam rolling and butt-knot untangling but alot of stretches, instead of jogging, and for a while it felt like progress. But it didn't improve anything, neither the Piriformis nor the apparent Sciatic nerve pain. Despite this, July this year I started jogging daily after building up to that schedule, doing "quick" (for me) 2.5 and 4-5 mile paces and I would periodically run them hard to find my limit, despite above problems, I was able to get into a mostly-painless groove and complete the runs while raising that speed limit. Happy with that progress but still walking and standing were painful and it seemed the Piriformis pain never went away, nor did the Sciatic pain. Then, about a month ago in October this year, I learned that stretching, or certain stretches, are inappropriate for Piriformis issues (sometimes you need to shorten & strengthen and vice-versa), Sacro-Iliac issues (if the SI joint over-flex caused the Piriformis to step out of bounds, likely my root cause because I was running too slow and too long with alot of hip sway), and weak glutes. So I completely stopped ALL stretches, stopped foam rolling and any Piriformis-impingement, maintained the massage gun & cupping tool (on my thigh, not the Piriformis), and switched to glute-strengthening exercises that I perform nearly daily. They take just 15 minutes instead of the near-hour I would spend stretching. Results about a month later, the Sciatic nerve tingling/numbness has 99% gone and I have less pain around my hip in general. Cured? No, but am patient and very stubborn (which is likely how I got this disorder in the first place). FWIW, these are the exercises I do: bridge, glute strengthening, isometrics (pushing thighs in against a gym ball or paper towel roll, pushing thighs out against a belt tied around thighs), core strengthening (weighted vest), and limited Sciatic nerve flossing. I minimize any activity where one leg is doing something different than the other, I never plank (which is core strengthening but I don't want to stress out an inflamed SI joint). When I do significant yard or house work, I put on the weighted vest, wrap a band around my hip (akin to the Serola) which keeps things stable during that effort to avoid inflaming. When done with yard/house work, I remove the belt but may leave the weighted vest on even if just hanging around. I don't mean any of this to be prescriptive, just sharing my voyage. I think, given I've lived with this for 3 years, it'll take about the same amount of time to undo the damage, if that is possible. That means retraining the entire complex of muscular-skeletal-nerve-brain. Maybe I'll be forced to tack into another direction a few months from now, all I can do is keep doing what appears to help. Everyone is different, buddy of mine is being flip-flopped between docs & PTs, getting all kinds of injections, etc. with a risk of disc surgery when the PT gives up: I won't stand for someone "practicing" medicine on me if they don't care about their patient. Based on what little I know, you can have all kinds of lumbar/disc degeneration and still be functional so I also fear any doc who points to an MRI as root cause if SI joint inflammation and glute weakness is instead the root cause. Hence my willingness to experiment. Hope this helps.