The exercise alternating dumbbell hammer curl primarily works the muscles Biceps brachii and secondarily works the muscles Forearm, Biceps.

Proper position Stand upright with your back straight. Take a pair of dumbbells, place your hands in a hammer grip, your arms straight. Movement Practice bending your forearms. Practice an extension of your forearms. Breathing Inhale into the flexion. Expires in the expansion.

Proper position Stand upright with your back straight. Take a pair of dumbbells, place your hands in a hammer grip, your arms straight. Movement Practice bending your forearms. Practice an extension of your forearms. Breathing Inhale into the flexion. Expires in the expansion.