Close to the perfect upper-body workout, pull ups are a compound exercise that stimulates growth in upwards of twenty different muscles in your back, shoulders, chest and arms. With the added benefit of a belt for added support, this easily adjustable pull up assistance tool lets you take advantage of all the variations of assisted pull ups, chin ups and knee ups as well as core-strengthening planks to build upper body strength and coordination and improve posture. Includes one 24" x 36" full-color wall poster highlighting beginner, intermediate and advanced exercises.