1.   He flexed his toes on the carpet.

2.   He flexed his toes again.

3.   Flex your toes toward your knees, so your calves and foot muscles are stretched and limbered.

4.   Flexing her toes in her new shoes, Ms. Graziano smiled and proclaimed herself comfortable.

5.   Night splints keep the toes flexed and the tissue stretched, relieving morning aches.