During the gait cycle the foot can pronate in many different ways based on rearfoot and forefoot function.
In a supinated position, it tends to pronate as it flexes.
When the pitcher lets go, he must pronate his wrist, or turn it so the palm faces third base.
During the loading phase of the running and walking cycle, the ankle and foot naturally pronate and supinate by approximately 5 degrees 4.
It is common even for people who pronate normally to have some angle between the foot and the ankle, but not to the extent seen in those who overpronate.
This inability to pronate the hand is also supported by "in-situ" finds of articulated (still-connected) arms that always show unrotated hands with palmar faces facing each other.
