Triceps
Forearms
Lie flat on bench.
Hold dumbbell each hand, arms extended straight up over shoulders, palms facing forward (pronated).
Keep upper arms stationary.
Inhale, lower dumbbells towards ears/sides of head by bending elbows.
Keep elbows tucked.
Stop when forearms near biceps.
Exhale, extend elbows using triceps to push dumbbells back up.
Repeat.