This summer I did a lot of work fixing issues with my (congenital) leg length discrepancy. What I found was that after 50+ years with it nobody can really figure out what triggered it, but flexibility, balance and strengthening exercises for the core and hip stabilizers can reduce the effects of it.
But even after all that, I still feel like my right leg is longer than my left...when I tense both legs I list to the left a noticeable bit....and...I'm still having this niggly left foot issues. I'm not losing any training mojo..yet..but it's still a concern. My feeling was that I was bashing the left (short) leg...there is only so much you can do with form..if one leg is short it gets a harder landing. The more padded shoes are helping but it's still not good enough.
So today I tried a small lift in my left shoe. I made it from cardboard because that was cheap, easy to cut and about the right thickness after it gets crushed down.
I just traced the bottom of my insole on some cardboard and cut it out. After you walk around for a bit it gets properly compressed.
There is a danger in doing this kind of thing: long long ago I tried this and it was not a happy thing..my right foot could not take the load! My hope is that my right side strong enough now.
The run today with 4x1 mile at 8:00 pace felt really great...I felt my stride was more balanced and my left foot was not getting pounded as much. I'll let you know how it goes....if it seems to be working out well I'll coat the cardboard with duct tape to make it waterproof.