Stand up straight with your feet shoulder-width apart and hold a dumbbell in each hand, palms facing your body.
Keeping your upper arms stationary, exhale and curl the weights while contracting your biceps. Continue to raise the weights until your biceps are fully contracted and the dumbbells are at shoulder level.
Hold the contracted position for a brief pause as you squeeze your biceps.
Inhale and slowly begin to lower the dumbbells back to the starting position.