He is doing a special exercise to strengthen his extensor carpi radialis brevis.

The extensor carpi radialis longus is a part of the arm muscles and helps in the movement of the wrist.

The flexor carpi radialis is an important muscle for bending the wrist.

He is doing special exercises to strengthen his extensor carpi ulnaris.

The root of this tree is very deep and strong.

He is doing special exercises to strengthen his extensor digitorum brevis muscle.

He held my hand.

He works at the blacksmith's every day to forge his skills.

He is doing a special exercise to strengthen his flexor carpi ulnaris.

He was standing on the side of the road.