As we know, overtraining the chest, leading to overdevelopment in relation to the back and associated postural muscles, can also lead to hampered performance due to Upper Cross Syndrome. This is characterized by the chest overpowering the shoulder girdle, leading to poor posture (kyphosis) and likely shoulder impingement.
This can be avoided with appropriate corrective exercise.
I'd like to know if overdeveloping the back can have negative noted effects. I already understand the importance of avoiding asymmetries and its relation to injury reduction, but not if it leads to actual diagnosed problems down the road because it's not in an ideal ratio in relation to the chest and shoulders.