He is doing special exercises to strengthen the opponens digiti minimi muscle of his foot.

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 digiti minimi.

The rectus capitis posterior minor muscle is a part of the neck muscles, and it helps tilt the head backwards.