He is doing special exercises to strengthen his flexor hallucis brevis.

I started exercises to strengthen the abductor hallucis muscle.

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

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

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

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

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