Stand upright, with your feet about shoulder width apart and your arms to your sides. Hold a dumbbell in each hand, with your palms turned toward your body. Keeping your arms straight, lift the weights out and up to the sides until they are slightly higher than shoulder level. Then slowly lower them to your sides. It's important to keep your palms turned downward as you lift the dumbbells so that your shoulders, rather than your biceps, do the work. Make sure you lift the dumbbells on the way up rather than "swinging" them up. Don't lean forward! Keep the dumbbells at your sides.