What is the muscle focus when performing the neck stretch

Explanation:

Two sided of the neck are being focused while performing the neck stretch. The main side is the upper portion of back bone, which we can say the behind the shoulders area. These muscles are targeted most when neck is stretched. If you stretch your head down, you will feel a pressure on the middle of the shoulders. The other area where neck stretches focuses is the collar bone and the lower area of the face. If you move your neck backwards, you will feel a stretch on your collar bone as well as on the lower area of the chin. By doing neck stretches, the shoulder and relative neck muscles are strengthened.