You flex you foot by "picking up" your toes.
yes the flex foot is still used and if you look at this answer there is a 50% chance it is wrong
eating
Flex your foot
1997
Van Phillips
it was Van Phillips
yes
1997
an inflamation of the entire joint
They took a picture of their foot, put it into a computer, the computer did all the work. Lazy Bastards
The bottom of the foot is called the plantar surface. Plantar flexing is contracting the muscles of the foot so that the toes move down and the arch increases.
Tibialis posterior