Ta-da! Welcome to my world, lol.
My righ ES (erector spinae) is larger and firmer than my right (as commented on by any chiro I’ve ever visited with a pair of eyes and the inclination to be bothered to check).
I struggled to correct the imbalance at the back, but really, I don’t see how its possible, seeing as the ES muscles are so close together and their function so intertwined with each other, that they tend to fire together during any back extension exercises.
So I questioned what might cause the imbalance in the first place and came to the realisation that (in me at least) it is a weakness/imbalance in my anterior core muscles (specifically a small area of my int or ext - I think int. - obliques) on the left lower side.
If I kneel and do vacuums, I can actually feel an area of my obliques that won’t fire up correctly. It seems to be slightly ‘dead’ in terms of nervous recruitment. It’s only a small (few sq cm) area and doesn’t seem to affect gross strength in my anterior chain, but I would guess that during sub-maximal activities of daily living, there is a functional weakness that is compensated for by my hypertrophied right ES.[/quote]
Well, I’m glad to hear another story with the same area of concern. Always good to have company on these weird things.
It is hard to understand how it could happen considering the closeness of the muscles.
I was hoping it would be some kind of imbalance or underdevelopment in an associated area.
I do some single leg work already, is more than answer?