He is training his triceps brachii muscle every day.

He is training his brachialis muscle every day.

He trains his triceps at the gym every day.

He goes to the gym every day to train his biceps brachii muscle.

His upper arm is muscular and looks very strong.

I strained a muscle at the gym yesterday.

He goes to the gym every day to train his triceps surae muscle.

He trains his biceps at the gym every day.

He is doing special exercises to train his temporalis muscle.

He goes to the gym every day to train his quadriceps.