11. The arch is pronating -- rolling over-- which is creating an extra strong force on the ankle. 12. +Rotate your forearm from a pronated position ( palm down ) to a supinated one ( palm up ). 13. When pronated , the brachioradialis is more active during elbow flexion since the biceps brachii is in a mechanical disadvantage. 14. Once at the pyramids, the Brachial Plexus and stimulates the Pronator Teres to contract causing the hand to pronate . 15. By pronating his wrist upon release, the pitcher can make the pitch break in the same direction as a screwball. 16. When the pitcher lets go, he must pronate his wrist, or turn it so the palm faces third base. 17. Some have associated a " pull-up " with utilizing an overhand ( pronated ; palms facing away ) grip. 18. The individual starts by grabbing a vertical object such as a pole or tree trunk, with both hands palms pronated . 19. Regarding posture, a pronated foot is one in which the heel bone angles inward and the arch tends to collapse. 20. For most, bringing the chin this high is most easily achieved with a pronated ( overhanded, palms-away ) grip.