The key reason why would be that the firmness of all sides of your bed is often altered. If you want it firmer than your partner, these beds might be modified for that. Placing a pillow between your knees can assist keep the hips degree plus your spine in line. http://neck-and-back-pain-relief18529.blogolize.com/How-Much-You-Need-To-Expect-You-ll-Pay-For-A-Good-Mattress-for-back-pain-relief-28668031