Hello! Both movements can stimulate the back muscles. However, the emphasis is different. Pull-ups focus on the width of back muscles, and it is easy to practice the shape of an inverted triangle, which mainly stimulates latissimus dorsi and biceps brachii of other muscles. However, pull-ups require a lot of strength, so it is difficult for beginners to achieve the standard movements of 8- 12 without leveraging their strength. Dumbbell rowing focuses on the thickness of the back, focusing on the middle trapezius muscle, the lower trapezius muscle, rhomboid muscle and other back muscles.