Sleep
Bedtime Routines And Why They Work
A short predictable sequence before sleep works through learned anticipation and reduced arousal rather than through any single activity in it.
Bedtime routines are recommended almost universally, usually without explanation. The effect comes from predictability and from what the sequence does to a baby's arousal level.
Prediction is the active ingredient
A repeated sequence lets a baby anticipate what comes next. Anticipation reduces the alerting response that novelty produces, which lowers arousal before sleep is attempted.
The specific activities matter far less than their order and consistency. A sequence that is the same every night carries the signal; a varied one does not.
This is why routines work in unfamiliar places. A recognisable sequence supplies continuity when the room and bed have changed.
Direction of travel
An effective routine moves steadily toward lower stimulation: brighter to dimmer, more active to less, louder to quieter. Each step reduces input.
Routines that include an exciting element near the end tend to work against themselves, because arousal rises immediately before sleep is expected.
Length matters less than direction, and a short routine done consistently outperforms an elaborate one done variably.
Where the bath fits
A bath is common in routines, and the mechanism is partly temperature. Warm water raises skin temperature, and the subsequent heat loss produces a fall in core temperature that accompanies sleep onset.
For some babies a bath is stimulating rather than calming, and forcing it because it appears in every published routine is counterproductive.
The bath is a component, not a requirement. Any activity that reliably reduces stimulation can occupy that position.
Feeding's place in the sequence
Feeding is calming and produces drowsiness, which makes it a natural closing step and also makes it a strong sleep association. Both effects come from the same place.
Moving the feed earlier in the routine, so the last step is something else, is the usual adjustment where parents want to change that association.
There is no obligation to make the change, and feeding to sleep remains a reasonable choice for many families throughout the first year.
What routines do not fix
A routine influences settling at the start of the night. It has limited effect on waking later, which is driven by sleep cycles, hunger and development.
Very young newborns do not yet have the rhythm a routine works with, so beginning one is more about establishing the habit for later than about immediate results.
Sudden loss of an established routine's effectiveness, particularly with distress, illness signs or feeding changes, is worth raising with a health visitor.
