Seated Dumbbell Palms-Down Wrist Curl
Hold dumbbells and sit at the end of a flat bench with your feet flat on the floor and about 20 inches apart. Lean foreward and lay your forearms on your upper thighs,palms down. Place your wrists over your knees. Lower dumbbells as far as possible keeping a tight grip. Curl dumbbells up as high as possible without moving your forearms.