It's important to train your antagonist muscles as well when doing muscle training.

If the movement of the eyeball muscles becomes impaired, your vision becomes blurry.

As I was walking down Tenkajiku, there were many shops lined up.

He is suffering from muscle pain in his gemellus muscle.

He is doing special exercises to strengthen his intercostal muscles.

He is doing special exercises to strengthen his mentalis muscle.

He is doing special exercises to strengthen his caninus muscle.

His long talk is just like 'a hundred days of sermonizing without a fart.'

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

He trains his biceps at the gym every day.