Whilst there are some rowing dependent exercises that happen to be finished with dumbbells, I prefer to pick a more difficult exercise and add some excess weight to it. The basic spinal erector exercises are deadlifts and entrance squats. You are able to do dumbbell Romanian deadlifts, Which might help. https://hammer-strength-dumbbell93251.blog-kids.com/33465181/the-basic-principles-of-back-exercises-with-dumbbells