So I used up my 7-day trial of the subscription and noticed minimal hip flexor training as opposed to hamstring work in the Front Splits stretch series. (I have not continued the subscription at this time hence I can't post in the right forum but I will avoid posting specifics)
I believe that working through the routine also caused lower back issues which I have always attributed to tight/weak hip flexors/quad muscles and I have noticed recently that while I seem to have better strength, my lordosis has increased, although that's probably because I haven't been training as much.
So I guess my question is, how important is it that I stretch quads/hip flexors? Should I focus more on glute work, e.g., glute bridges? I can't even extend my hips into neutral, it's been that way since I was a kid although improved a lot since around 2012 when I finally learned about anterior pelvic tilt. Previously I was doing a LOT of hip flexor stretching but found I was then experiencing serious weakness in lifting my legs that would also trigger back pain.
I also was given advice from a physio that engaging the glutes and maintaining PPT through the couch/hip flexor stretches was the most important part of the stretch but this seems to be given a low priority in the stretch series? I'm wondering if this was perhaps a trigger for my lower back soreness.
Any advice would be appreciated! At this point I am planning on trying to spend more time strengthening rather than stretching, especially after seeing the (external) videos on side plank work improving hip flexor mobility (as posted in the hip swivels thread under F1)