Bent over two arm dumbbell row. A major compound exercise! Target muscle: None. Multiple back, arm, and shoulder muscles work synergistically. Synergistic muscles: Latissimus Dorsi, Teres Major, Posterior Deltoid, Middle and Lower Trapezius, Rhomboids, Infraspinatus, Teres Minor, Brachialis, Brachioradialis, and Sternal (Lower) Pectoralis Major. The Biceps Brachii and the Long Head of the Triceps Brachii act as dynamic stabilizers.