This is an excellent tool for a fitness nut who may not have much space for a home gym or doesn't have the time or resources to go to a gym. If you're thinking about investing in fitness bands for the P90X work out, then you might choose to consider the Bodylastics Resistance bands. All you need for an inexpensive home gym are an exercise mat, set of adjustable dumbbells, a stability exercise ball as well as an adjustable bench would be great BUT not necessary.