With a tall posture let the dumbbells hang from the sidesand stand with feet hip width apart.
Step one foot in front and begin to lower the rear knee to the ground. Do not let the front knee travel over the toes, if it does, chances are you did not step out far enough. At the bottom, maintain a slight lean forward with the torso to prevent stressing out the knee.
Press into the ground with the front foot and press off of the ground to move your body back to the starting position in one controlled movement.