Sharing a bed with a restless sleeper: what actually helps, in order

If you sleep next to someone who turns over every ten minutes, gets up in the night, or thrashes through dreams, you know the feeling of being awake at 4 am while they sleep soundly. The bed can fix a surprising amount of this. Here is what helps, in the order to try it.

1. Width (from £0 if you already have the room)

The single most effective change. On a double, each of you has 67 cm; on a super king, 90 cm, a full single each. Most movement simply does not reach across that. If the room allows a bigger bed, that is the answer before any mattress. See king or super king.

2. Two duvets (£30 to £150)

Half of what you feel is not the mattress moving; it is the duvet being dragged. Two single duvets on a king or super king bed, each person under their own, ends the tug-of-war and the cold-shoulder moments. It also solves the hot-sleeper versus cold-sleeper argument.

3. The mattress build (£500 and up)

A mattress carries movement when its layers are connected. The order, from most movement to least:

For a restless partner, a foam core with a micro-spring layer and a thick memory foam top is the quietest build that is still comfortable to move on. It gives up the bounce of springs, which is exactly the point.

4. The base (£0 to £300)

A creaking frame or a divan with a loose castor announces every turn. Tighten the bolts; put felt under the feet; replace a broken slat. A solid platform-top base is quieter than slats.

5. Split tension, if the problem is weight (£100 extra)

If the restless one is much heavier, their side of a single spring unit compresses more and the lighter partner rolls towards them, and every movement is felt through the tilt. Split tension, one spring unit per side, keeps each side level. It is for weight difference rather than movement itself. See split tension explained.

6. The rest

• Separate bedtimes so the light sleeper is asleep before the restless one gets in.
• A white-noise fan covers the rustle that wakes you more than the movement.
• Address the restlessness itself: restless legs, sleep apnoea (snoring with pauses) and pain are medical, and a mattress does not treat them. If the restlessness is new or extreme, a GP visit is the right first step for them, not a new mattress for you.

7. Separate rooms, sometimes

More couples do this than admit it, and for some it is the difference between resenting each other and not. It is not a failure. A mattress that carries little movement and a bigger bed usually make it unnecessary, but it is on the list because it works.

How we built ours

The New Parent is the quietest bed we make: a 10 cm foam core with a layer of micro-springs and 5 cm of 60 kg/m³ memory foam on top, so one of you moving is not felt by the other. It was named for the years when someone is always getting up, and it works just as well for a light sleeper with no baby involved. It comes in double, king and super king.

The short version

• Width first: a king or super king does more than any mattress.
• Two duvets.
• A foam-core mattress with micro-springs and a thick memory foam top carries the least movement.
• Fix the creak in the base.
• Split tension for weight difference; a GP for restlessness that is medical.