I'm of a heavier stature, will a medium mattress support me adequately?
A medium firm mattress or firmer may be more suitable. This is because the tension in the springs of a medium mattress are much lower than firmer mattresses, and as a result, too much weight can cause the springs to deteriorate much quicker. Overall, this means that you'd have to invest in a new mattress much sooner. Therefore people who are of lighter to average statures can be supported on such surface, and the springs can be as effective as they were designed to be.