This is a subjective question. It greatly depends on the how the body structure response to the firmest mattress. In many cases, a medium-firm type of mattress may be the solution. Too firm a mattress, might not be able to relieve the pressure points on your body. And too soft a mattress, might not be able to provide the support that the bad back sufferers need. We suggest you speak to our bedding consultants to find out more.