He is doing a special exercise to strengthen the subclavius muscle.

He is doing exercises to strengthen his genioglossus muscle.

The cricothyroid muscle is an important muscle for adjusting the tension of the vocal cords.

The hyoid muscle is an important muscle that connects the larynx and the tongue.

The sternothyroid muscle is part of the neck muscles, connecting the sternum and the thyroid.

The arytenoid muscle is part of the laryngeal muscles, regulating the opening and closing of the vocal cords.

The epicranius muscle is one of the important muscles for making facial expressions.

He measured muscle activity using an electromyograph.

I examined muscle activity using an electromyogram.

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.