When training neck, is it possible to only increase neck size from back?

[MD_Hopeful69]

I feel pretty solid with my frontal face. Not amazing but definitely has good harmony and pretty features. But my side profile is not as good as my front and I wanna change that. I feel like training the back of my neck would make my head look more flatter from the back

 

[Deliverance]

Yes. By doing only neck extension. But that would lead to imbalances in my opinion.