1. Keep your feet apart, parallel to each other and shoulder-width apart, stand upright, put your right hand on the left side of your head, and exert a little force.

2. Move the head to the right until the left side of the neck feels obvious stretching;

3. Turn your face to your right shoulder so that the neck can feel continuous stretching.

4. Keep this action 15 seconds unchanged. Change the other side and repeat the group of actions in the original order.