She exercises her facial muscles every day to keep her face youthful.

She was massaging her nape.

He is doing special exercises to strengthen his cervical muscles.

He trains his deltoid muscles at the gym every day.

He has strong masseters, so he can easily bite through hard food.

If your muscles of mastication are strong, you can chew food more efficiently.

He is doing special exercises to strengthen his tensor fasciae latae.

This sentence contains non-Jōyō kanji.

This sentence contains kanji not approved for regular use.

The external anal sphincter plays a crucial role in helping us control defecation.