When we asked Dr. Stuart Gordon if users can stop using Barefoot Science insoles after level seven, he says: “No. The body can only respond to the stimulation it receives.” He elaborated that when you stop using the level 7, your feet will eventually degrade and go back to being weaker. If you have problems that are fixed by the insoles, those problems can come back when your muscles are degrading. It is like bodybuilding, if you stop working out, eventually you will lose that muscle strength.