Experience shows just the opposite. Doctors internationally are using the back slings to teach their patients to sit straight. Once trained in new habits of good posture, users find it easier to sit properly without the supports. Primarily, the back-sling acts as a guard against slouching and disc damage because it works like an extra muscle to keep the back supported. Unfortunately, the major contributor to back disease and weakness is the common office chair that provides only the illusion of support while causing the user to slouch against the backrest.