First, pick up one of our hands. Then put it behind the cervical vertebra.
Note that when the hand is placed at the back of the cervical vertebra, the head is low.
Next, we take a deep breath, then slowly look up, exhale when looking up, and at the same time, our fingers slide slightly.
My hand slipped when I saw the limit.
Do it left and right ten times in a group. Do three groups at a time.
Do it left and right ten times in a group. Do three groups at a time.