I strained a muscle at the gym yesterday.

My family consists of four people.

I drew a four in mahjong.

He trains his biceps at the gym every day.

He trains his triceps at the gym every day.

Strengthening the occipitalis muscle can reduce neck pain.

He is doing special exercises to train his temporalis muscle.

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

Don't stick your head out.

He can speak four languages.