Hold a dumbbell in each hand and pull your shoulders back. Lift your chest up and look straight ahead. Position your right leg forward in a long stride. Your foot should be far enough in front of you so that when you bend your right knee,your thigh and lower leg form a right angle. Slowly bend your knees,lowering your hips so your rear knee just clears the floor. Pause briefly in this position,then slowly straighten your legs and raise your body back up to a standing position. Complete a full set,then switch legs and repeat,or alternate legs for each repetition.