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.

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

Understanding the rules of 'Ha-gyou tenko' is difficult.

He trains his biceps at the gym every day.

He does piriformis muscle stretches every day.

The stapedius muscle is the smallest muscle located in the human middle ear.

He trains his gluteus maximus at the gym every day.