START: Sit at the end of a flat bench with your legs in front of you and feet flat on the floor, spaced hip-width apart. While holding a barbell with a shoulder-width, underhand grip, rest your forearms on the tops of your thighs so that your wrists and hands hang off your knees. Extend your wrists back so that your hands hang down from your wrists at about a 90 degree angle. The bar should be supported with just your fingers.
MOVE: Curl the weight up, starting with your fingers, then your wrists, until your wrists are flexed and your hands are as high past parallel with the floor as possible. Hold this position for a second while forcefully contracting your forearm muscles, then slowly return the bar back to the start in the reverse manner.

