The dumbbell row works many different muscles in your upper body. This includes your traps, rhomboids, lats, biceps and rear shoulders. You perform dumbbell row by standing with your upper body almost horizontal to the floor. You keep your back straight and your body weight should shift onto your heels. With a dumbbell in each hand, allow your arms to hang down towards the floor with a slight bend in your elbows. With each rep, you’ll squeeze your back as you pull the dumbbells up to your sides. With each rep you’ll keep your elbows close to your body.