He is doing exercises to strengthen the dorsiflexion of his ankle.

He underwent surgery due to an injury to his extensor pollicis brevis.

He had difficulty walking due to an injury to his extensor hallucis brevis.

He is doing special exercises to strengthen his flexor pollicis longus.

He started a special exercise to strengthen his flexor hallucis longus.

I go to the gym every day to build my muscles.

This river is three long.

He likes to take a walk in the park at dusk.

He is doing special exercises to strengthen his abductor pollicis brevis.

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