Side sleepers typically require softer mattresses. Most people who sleep on their side should experience quality pressure relief without losing vital support in the mattress range of 3 to 4 medium soft. Pressure relief is important to side sleepers because this position causes body weight to become concentrated over a smaller surface area. Above average weight side sleepers would suit a 5 to 6 medium firmness rating given the higher concentration of weight when sleeping on the side. Likewise heavier weight side sleepers would be suited to a 7 to 8 medium firm firmness rating.
Stomach sleepers usually enjoy a firmness around a 7 or 8 medium firm, though some lighter weight sleepers might like a 6 medium rating. The reason for this is that they typically prefer minimal sinkage to help make sure their midsection doesn't dip too much, as this could cause the spine to curve in at an awkward angle. Heavier weight stomach sleepers will prefer a firmness rating of 9 or 10 orthopaedic to ensure there is not too much sinkage and spinal alignment remains correct.
Back sleepers are typically best suited to medium-firm mattresses between 7-8 on our firmness scale. These mattresses often provide enough firmness while still giving the sleeper good pressure relief. However, heavier weight sleepers may suit an orthopaedic feel. Lighter weight sleepers may suit a medium soft firmness or softer products, depending on their weight.
Heavy people usually do well with medium-firm to firm mattresses, though their sleep posture will also influence this. Heavier sleepers place more pressure on the mattress, and that’s why the natural reaction for it is to sink too low. A firmer feel will allow them to activate pressure-relieving layers without bottoming out. The thickness is also important for heavier sleepers.
Light weight people are an ideal match for medium soft to medium-firm mattresses depending on their sleep position. This is because they won’t be putting a lot of pressure on it and as such, the sinkage is not going to be substantial. A lightweight sleeper on a firm mattress can create more unnecessary pressure points. The goal is to have your mattress contour your body enough to melt away pressure.
