He acknowledged his mistake and self-reflected by placing his hand on his chest.

He admitted his mistake and decided to deeply self-reflect.

I was filled with his kindness.

His kindness made me have a lump in my throat.

After the exam was over, he was relieved.

He trains his pectoralis major muscle at the gym every day.

He exercises his pectoralis minor muscle at the gym every day.

The rotator thoracis is one of the muscles that helps in the rotation of the body.

He is doing a special exercise to train his longissimus thoracis muscle.

He is the type of person who understands ten from hearing one.