Why Spinal Alignment Matters
When you stand upright, your spine has a natural S-shaped curve. The goal of a good mattress is to maintain this neutral spinal alignment while you sleep, regardless of your position.
What Happens With Poor Alignment
If your mattress is too firm, your body cannot sink in enough, creating pressure points at the shoulders and hips (the widest parts of your body). If it is too soft, your body sinks too far, causing your spine to curve unnaturally.
Research published in The Lancet found that both extremes - too firm and too soft - increase morning back pain. The optimal mattress keeps your spine in its natural position throughout the night.
Pressure Points
Your body's weight is not distributed evenly when lying down. The three main pressure zones are:
- Shoulders - need to sink into the mattress (especially for side sleepers)
- Lumbar (lower back) - needs support to prevent sagging
- Hips - need a balance of cushioning and support
The right mattress provides enough give at the shoulders and hips to prevent pressure build-up, while providing enough support at the waist to keep the spine aligned.
Key Fact: A good mattress maintains your spine's natural S-curve during sleep. It must balance cushioning at pressure points (shoulders, hips) with support at the waist.
