The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
Had a sartorius issue causing medial knee pain once. Too much rugby, squats, and sprints for the ol’ knees. Try sleeping on your side with a pillow between your knees and your knees slightly bent. Keep quad smashing and stretching the junk out of it. Also, go get in a hot tub and take a break from PRs for a bit. Keep moving.