This exercise works the top and front of your shoulders, along with the triceps (back of the upper arm)
Stand with your feet hip distance apart, tummy muscles tightened. Hold the dumbbells in your hands at your shoulders, palms facing front. Raise your hands up towards the ceiling, squeezing your shoulders and slowly lower.
Complete the move in four seconds.
16 reps, rest and repeat.
Also read: Four steps to a flat tummy!