Stand upright with your hands by the side of your body with palms facing inwards, holding one dumbbell in each hand with a neutral grip.
Keeping your upper arms by your side, exhale and raise the dumbbells towards your shoulders by flexing your arm and maintaining a neutral grip. Avoid using your legs or back to lift the dumbbell.
Continue until your arms are fully flexed and the dumbbells cannot be curled any further.
Inhale and lower the dumbbells back down, returning to the starting position.