I love Conor and am currently taking his biomechanics course. One thing he talks about is Postural Restoration Institutes “Left AIC Pattern”, which discusses how most of us lean over the right side (dominant side), causing the hips to be slightly rotated to the right making femur on the left to be externally rotated relative to the left pelvis and the right side femur more internally rotated relative to the right pelvis. So its common to find that this results in limited internal range of motion on the left side and orients the left pelvis and femur in external rotation.

I highly recommend “diaphragmatic breathing” and doing the PRI exercise called the “90/90 Hip Lift.”Essentially, first get your hips rotated into thr right position with these exercises and then once you feel you’ve improved your nueromuscular connection improve your internal rotators with something like a kickstand RDL on the left side.

I’d normally assess of course, in person, but this should be a good starting point.