This seated row machine targets your back muscles. Muscles include Teres Major (outer back), the Latissimus Dorsi (middle back), the Rhomboids, the Middle and Lower Trapezius (upper back), the Erector Spinae (lower back), the Pectoralis Major, the Lower Chest Muscles, the Posterior Deltoids (shoulder), the Infraspinatus (shoulder), the Teres Minor (shoulder) muscles. Convenient seat height adjustment accomadates various heights; Chest pad adjust to suit different arm lengths; Marine grade double-stitched upholstery.