He underwent surgery on his extraocular muscle.

He is doing special exercises to strengthen his external obturator muscle.

The external intercostal muscle plays an important role in respiration.

He is playing outside.

In addition to keys and wallets, there are many small items in my bag to take outside.

He is playing outside.

He is playing outside the house.

He is deeply interested in Buddhist teachings, but he is open to learning non-Buddhist teachings as well.

His pronator teres was aching from muscle soreness.

He is doing a special exercise to strengthen the pronator quadratus muscle.