I'd like to find some correct and efficient excercises to train and develop just one side of the neck.
I've played Tennis for several years and my neck is lightly asymmetric; my right side is more strong and prominent than the left side specially the anterior and middle scalene muscles.
I did and I am still doing, with the help of a phisio, a lot of excercises and stretching for shoulders with rubber band to even my trapezius; the results are pretty good but the neck shape is still not there. The scalene muscles just above the collarbone while thick on the right side are literally inexistent on the left side.
Do you know any excercise to isolate and train these specific anterior muscles of the neck (Anterior and middle scalene), just on one side?
after reading @David-Scarlett answer I found this article about a baseball pitcher that shows exactly the hypertrophy of the anterior scalene like in my case.