While moving into Dandayamana Bibhaktapada Paschimottanasana I've noticed that my right erector spinae has hypertrophied far more than my left. I'm not certain how to do a strength comparison, but I'm fairly certain my right erector spinae often compensates for the left. The imbalance looks so drastic I wouldn't expect this to take less than a few years to fix, but I'm anxious to make the structural health investment. Where do I start??
As an aside, I fear attempting to address lateral imbalances can easily exacerbate the issue or create other imbalances in support muscle groups and complementary groups. I'd like to start with the most fool-proof method possible.