Choose an appropriate dumbbell weight matching your type of training.
Stand upright with your feet in a shoulder-width stance. Hold the pair of dumbbells so that your palms face your quadriceps and the backs of your hands face forward. Elbows are slightly bent.
Raise the weights directly in front of you all the way up to eye level without rotating your wrists and flexing your elbows. Return the weights to your sides. For an alternate motion, raise the weights laterally all the way to eye level. Breathe in as you go up and breathe out as you go down.
Choose the dumbbell weight to match your abilities, fitness level and training type. Start with lighter weight to master the technique well.
Focus on your abdominal breathing.
Elbows are slightly flexed throughout the exercise.
Avoid bending backwards at the waist and maintain your torso in an upright position.
Avoid fast and uncontrolled motion as you are coming back to starting position resulting from relaxation of the muscle contraction.
Watch yourself in the mirror to make sure you eliminate use of the trapezius muscles.
Choose the number of repetitions to match your training type.
Frequency of repetitions depends on correct breathing and technique.