Fast Anatomy Lesson
The muscles that move your wrists are located in your forearm and are generally divided into flexors and extensors. In conjunction with a number of smaller muscles, the forearms allow your wrists to move up, down, side to side and in rotation.
FLEXORS These muscles run along the underside of your forearm and come into play when you close your hand or pull your hand downward. Tightness here can make moves like handstands or a front squat, in which your wrists are in extension, uncomfortable or even painful.
EXTENSORS The muscles in the top of your forearm work the opposite way, pulling your fingers up and open and putting your wrist in extension. Tightness here can negatively affect your overhand grip in moves like a farmer’s carry or a pull-up.