How can I effectively perform bent over lat pull unders to target my back muscles?

To effectively perform bent over lat pull unders to target your back muscles, start by bending at the waist with a slight bend in your knees. Hold a barbell with an overhand grip, keeping your arms extended. Pull the barbell towards your chest, squeezing your shoulder blades together. Slowly lower the barbell back to the starting position and repeat for desired reps. Focus on maintaining proper form and engaging your back muscles throughout the exercise.