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 a special exercise to strengthen his flexor carpi ulnaris.

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

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

He was diagnosed with amyotrophic lateral sclerosis.

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.