Stiff legged deadlift
-with slight bend in your knees, move your feet shoulder width apart.
-Focus on upper part of your leg, proper form is required, you don't want to involved your back too much.
-imagine you are trying to reach your toe with your hand, both of your feet standing closed together as you are stretching your hamstrings.
-keeping dumbell closed to your legs while rounding your lower back, descend slowing than do back to starting position.