Stand holding a pair of dumbbells just outside of your shoulders, with your arms bent and palms facing each other. Your feet should be shoulder-width apart, your knees slightly bent [A]. Dip your knees [B] and then press the weights straight over your shoulders until your arms are completely straight [C]. Then lower the dumbbells back to the starting position and repeat. Make sure to get your legs into it: The point is to have your thighs help you push the weights up.