I may be completely off here but I would venture to say that a lot of the leg "straightening" and positioning can be helped with better hip mobility and just pure muscle memory. Having tight hips and having unbalanced tight hips can really affect your foot and general leg position and can prevent you from proper leg position. Like you will not believe how much stronger you are and what better muscular engagement you'll get when your hips are more "open". Again, I may be totally off here but practicing hip mobility exercises never hurt anyone eh?
Also I haven't read through the second page of this thread so I am only going off the first and third pages. Sometimes we'll get into a bad habit of doing something either because we've never been corrected on it or we just slowly fell into it over time and suddenly it got to a point where it was just noticeably wrong. Then we have to make a very conscious effort every time we get on and ride to correct that behavior until it becomes natural. Anyhow, this was a very interesting thread from the bits I read and although I've never had this particular issue before, I have had certain leg pain due to improper leg positioning while riding.
Agreed. I developed a tilted pelvis after my 2nd child (2 C-sections in less than 2 years + carrying a 2 yr old around on my hip while tending to my new baby). My sciatic nerve would lock up and cause incredible pain. I did some physio for a while, then stopped when I didn't have pain anymore, but that didn't straighten my pelvis. Years later, I did physio for my back and we realized my pelvis is off again. The physio also told me my hips are very tight. Have been doing some exercises, but clearly, the problem is still there to some extent.
I do think my legs feel different when I'm riding. My right leg seems farther forward than my left when I ride at home. Of course, given the pictures, this could all just be in my head. Will discuss it with the coach to see if she can see a difference.
I'm going to be seen by an osteopath next week so that will be interesting.
In the end though, while I want to have a correct riding position so I'm not a burden on my mare, I don't plan on ever showing so I'm not necessarily looking for perfection. As long as I'm balanced and don't have pain (which I don't when I ride at home), that's enough for me. At my age (46), it may be difficult to correct these irregularities.