You can tell if your innerspring mattress will work in the zero-gravity position by looking at its age and quality of materials. Most newer innerspring mattresses are made with flexible pocketed coils to move with adjustable bed frames. Older innerspring mattresses, however, have less-advanced coil systems and are not as equipped for adjustable bed use or the zero gravity position. For more information, check out our guide on mattresses that work with adjustable beds.