2, natural sitting or standing posture, head drooping as far as possible so that the back of the head is parallel to the ground, and the back is kept straight for 5 seconds. Then put your neck back, let your forehead point to the ceiling, keep it at your limit for 5 seconds, and then put your head back in an upright position. Repeat the action 15 to 20 times.
3. Sit or stand naturally. Put your right hand on your right ear and put slight pressure on your head. Keep your head as close as possible to your left shoulder for 5 seconds, and then your head will return to its normal position. Then keep your head as close to your right shoulder as possible in the same way and repeat the action 15 to 20 times.