Stand tall with a neutral spine and your feet hip width apart. Hold a dumbbell in each hand. Raise the dumbbells up so they're just hovering above your shoulders, palms facing in. This is the start position. As you exhale, push the dumbbells up and directly over your head by extending your arms. Do not lock out your knees but be sure not to use momentum from your lower body to push the barbell overhead. Think about initiating the push from your elbows as opposed to your hands. Slowly return to the start position inhaling as you do so. Repeat for the required number of reps (or time).