DESC: Shipping Included. Authorized Stairmaster Dealer. The Stairmaster 4400 PT Remanufactured Stair Stepper's unique, rail-less design encourages you to adapt a more erect posture so that you use more of your lower body muscles throughout the exercise. Without side rails you are discouraged from bending at the waist, thereby preventing your arms from helping you off-load your body weight. This can reduce the effectiveness of your workout by as much as 30-40 percent. The independent step action offers the extra wide sweet spot that makes the Stairmaster. The 4400 PT Remanufactured Stair offers a wide range of exercise options to provide constant motivation and challenge for everyone regardless of age or fitness level. The speed control buttons allow for an increase or decrease. The stepping speed at any point during the workout. The new computer consol motivates the user during workouts, with different program options and workout statistics. With its 2 x 4 feet floor space footprint, this is