Back sleeping is one of the best positions for spinal alignment, but only if your mattress supports you correctly. The goal is simple: keep your spine neutral while supporting the natural curve of your lower back. If your hips sink too far, your lower back can arch and feel tight in the morning. If the surface is too firm, pressure builds under your tailbone and shoulder blades.

Most back sleepers do best on a medium firm mattress. This feel provides enough contouring to support the lumbar area while offering the pushback needed to keep the hips level. The right balance helps reduce stiffness, improve comfort, and support consistent alignment throughout the night.