TRX is an equipment designed to use your body weight to do the workouts.Your body is in the Air in order to suspend the weight in the equipment. Since you need to use your body you need to be using each and every muscle of your body to do one single exercise. Thus activates the deep lying core muscles to Stabilize the body during the workouts. Since you need to be using the whole body and taking the load in various parts of the body the workout makes you to get the shape and cuts in the muscles. Because it’s a whole body workout if you do it over a period it works in your Cardio as well. But the most important thing about this workout is you need to have Basic Strength to even to basic exercises with this equipment.