2. Draw an arc from front to back, left and right. First, stretch your neck as far as possible, then highlight your jaw as far as possible, and then retract it, so that your jaw can draw a circular trajectory and repeat it ten times. After completing this posture, let the jaw protrude forward to the right below, then take it back, and draw an arc in the opposite direction according to the arc trajectory just drawn, and repeat it ten times. Doing so can fully stretch the neck muscles, but not too fast.
3. Upper deltoid muscle bundle. First, keep standing or sitting, then lift your right arm up and bend back, then put your head tightly on your head, and then slowly twist your head to the right, so that the muscles on the left side of your neck can be pulled very well. Then change your left arm and repeat the position just now. In the whole process of fitness exercise, remember not to exert too much force, otherwise it will easily bruise our muscles, and then lose too much because of small.