@rockpir I think a physical therapist or orthopedist can just manipulate the leg and SI joint (sacro- iliac) and determine if the pelvis stays in proper alignment or not. There can be leg pain or back pain symptoms associated with misalignment. Imaging may show it too if it stays misaligned. In my case, I get both back and leg pain if one side of my pelvis comes forward because of SI joint laxity. It's not a huge problem, and I can feel some popping, and weakness in lifting a leg on that side if the alignment is off, and when the muscles are stretched out and tension is released, it allows better alignment and relieves the pain and most of the weakness on that side. I have been working on this with a physical therapist.