Come into a seated position on an exercise mat with your legs extended in front of you and your torso upright. Hold a dumbbell firmly in each hand with an overhand grip. Raise the dumbbells up in front of you, with the palms of your hands facing inwards and your elbows pointed directly forwards and bent at 90 degrees. This is the start position. As you exhale, push the dumbbells up and directly over your head by extending your arms. Slowly return to the start position inhaling as you do so. Repeat for the required number of reps (or time).