This exercise works all three muscles. In the inclined position this exercise particularly stresses the biceps brachii.
Straighten the legs keeping the back straight as you lift the dumbbells. Position yourself on the incline bench. Let the arms hang straight down at your sides with palms facing inwards. Keep the elbows against the sides.
Concentric contraction: Breathe out. Flex elbows fully.
Eccentric contraction: Breathe in. Lower the dumbbells together with control (2-4 seconds)