Difficult balance strength exercise. Preform a single-leg RDL, placing the dumbbell in opposite hand as the stabilizing leg. Reach dumbbell to toe, raise out of the RDL and make sure to bring opposite leg through full range of motion (raise knee to waist level). As you raise knee, lift the dumbbell laterally to shoulder height keep a straight arm. Start exercise with a very light dumbbell weight to ensure proper mechanics.