The semispinalis thoracis muscle is a deep muscle in the back that supports movement from the neck to the waist.

He said, 'Even if you die in the evening, it's okay if you ask the way in the morning,' teaching me the importance of living each day to the fullest.

He started exercises to strengthen his sternocleidomastoid muscle.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.