Typically benefit from a medium-firm to firm mattress (firmness 6–8) that supports the lower back's natural curve without letting the hips sag.
Need a softer to medium-firm mattress (firmness 4–6) that contours to the hips and shoulders to relieve pressure.
Often do best with a medium-firm mattress (firmness 5–7) that is responsive enough to allow for easy movement between positions.
Require a firm mattress (firmness 7–9) to keep the hips from sinking, which helps prevent lower back strain.