Dumbbell single leg deadlift with stepbox support

Stand with your feet hip-width apart, holding a dumbbell in your right hand. Place your left foot on a stepbox or elevated surface behind you. Keeping your back straight and core engaged, hinge forward at the hips, lowering the dumbbell towards the ground. As you lower the dumbbell, simultaneously lift your left leg behind you, maintaining a straight line from head to heel. Lower the dumbbell until you feel a stretch in your right hamstring, then return to the starting position. Repeat for the desired number of repetitions, then switch sides.