Muscles Worked: Triceps
Hold dumbbell with both hands and raise overhead to arms' length. Rotate hands while raising dumbbell so top plates of dumbbell rest in palms, thumbs around handle. Sit at end of bench, feet firmly on floor, back straight, head up. Keep upper arms close to head. Lower dumbbell in semicircular motion behind head until forearms touch biceps. Return to starting position. Inhale down, exhale up.