To anyone visiting this thread, here is my story. It is currently January 2021 and about a year ago I was 8 months PP and decided to pick up running again. As I increased my mileage gradually, I noticed that my hamstrings were pretty tight, especially my right one. Some stretches that used to be easy were not anymore and frankly I was avoiding stretching for the most part because I heard somewhere that you didn't need to and I was getting by without it. So then I started stretching it a lot...the flexibility of my left hamstring improved, but my right hamstring just got worse. I came to realize that I had a whole lot of tightness in my glutes and hamstring. Like many people on here, I felt like I was out of balance. But I kept running through it, with pain being about a 5, and also realized that I was starting to develop a hop. I guess it was covid and this was my mental health issue! I never got sick from covid but this happened to me.
Anyway, I decided to go see a chiropractic to check out my hips. Turns out my right hip was super tilted. So after 2 months of lots of chiro visits, we took another scan and it was 70% back to normal. I kept coming back every 4-6 weeks, but I felt like I was always in the same place. To manage the pain, I saw a PT for dry needling. I found this very helpful to relieve chronic tight spots. The pain went from tight hamstrings to piriformis to high hamstring tendon pain. The problem is that this PT (although specialized in runners injuries) was more in-and-out and never really spent time on the root of the problem. I started seeing the PT in June, where I started from scratch in my running. I took one week off and then progressed pretty quickly. The tightness kept coming back though and my gait still felt wonky. At the end of September, my dense brain thought hill sprints was a good idea....not though because I went on a quick decline to where a week later I could run 2 steps...the high hamstring was stuck...couldn't function. I could barely take the dog for a walk.
I ended up seeing a sports med doctor who said "yep, you have PHT", gave me some strength exercises, and set up an appointment for 6 weeks later, which I never went to and just kept going to my regular PT for pain management. The good thing that came out of that was he taught me the importance of not just eccentric loading, which I was doing, but HEAVY eccentric loading. I found that to be very helpful. I did a lot of single leg presses, but when I started doing single RDL with weights was when I started feeling improvements in strength.
So 10 months later, but I kept going to my chiro and things kept being the same. I decided to visit a pelvic floor specialist for leaking problems that escalated after I gave birth, but that I've struggled with all my life. After 2 visits, she SHOWED me physically how my pelvic floor posture should be. This fixed the last 30% of pelvic that the chiro couldn't fix. 10 months later! Finally solved the root of the problem. After a few months of training my pelvic floor is when I was able to finally go on runs without pain or tightness coming back in the hamstring and glute. Also making sure that my shoes are not too worn out helps. I am no where recovered 100% as I'm only 2 months in returning to run. It truly does take time. Visit lots of doctors from different specialities to get a whole perspective. I have a visit with a sports massage therapist next week and I'm also changing chiros to a sports chiro. Also, my gait is slowly getting back to normal, so that is another sign I am on the tail end of this injury, but my muscles still have a little retraining to work synchronously together and get stronger.
In summary, if you developed PHT, definitely consider pelvic tilt . Pelvic tilt will increase the tension in your hamstrings and not allow your core to engage in the right way. I never had a doctor who told me the root of the problem, but I discovered it myself and did a lot of self-analysis and self-retraining to get to where I am now. Be intuitive and listen to your body. Through this whole time I also did elliptical, swimming, and lifting. Don't sit on the couch. Also, there is a thing called a piriformis/sciatica pillow which may help if you have to sit in the car for a while.