He is doing special exercises to strengthen his platysma.

He is doing special exercises to strengthen his cervical muscles.

She was massaging her nape.

I strained a muscle at the gym yesterday.

He exercises his vastus lateralis muscle at the gym every day.

He is doing special exercises to strengthen his vastus medialis muscle.

He is doing a special exercise to strengthen his vastus intermedius muscle.

The rotator cervicis is an important muscle for turning the neck left and right.

The longissimus cervicis muscle is a part of the neck muscles, helping to pull the head back.

He has hurt his neck.